ErrorCopier::~ErrorCopier() { JSContext *cx = ac.ref().context(); if (ac.ref().origin() != cx->compartment && cx->isExceptionPending()) { RootedValue exc(cx, cx->getPendingException()); if (exc.isObject() && exc.toObject().isError() && exc.toObject().getPrivate()) { cx->clearPendingException(); ac.destroy(); Rooted<JSObject*> errObj(cx, &exc.toObject()); JSObject *copyobj = js_CopyErrorObject(cx, errObj, scope); if (copyobj) cx->setPendingException(ObjectValue(*copyobj)); } } }
ErrorCopier::~ErrorCopier() { JSContext* cx = ac->context()->asJSContext(); if (ac->origin() != cx->compartment() && cx->isExceptionPending()) { RootedValue exc(cx); if (cx->getPendingException(&exc) && exc.isObject() && exc.toObject().is<ErrorObject>()) { cx->clearPendingException(); ac.reset(); Rooted<ErrorObject*> errObj(cx, &exc.toObject().as<ErrorObject>()); JSObject* copyobj = CopyErrorObject(cx, errObj); if (copyobj) cx->setPendingException(ObjectValue(*copyobj)); } } }
ErrorCopier::~ErrorCopier() { JSContext *cx = ac.context; if (cx->compartment == ac.destination && ac.origin != ac.destination && cx->isExceptionPending()) { Value exc = cx->getPendingException(); if (exc.isObject() && exc.toObject().isError() && exc.toObject().getPrivate()) { cx->clearPendingException(); ac.leave(); JSObject *copyobj = js_CopyErrorObject(cx, &exc.toObject(), scope); if (copyobj) cx->setPendingException(ObjectValue(*copyobj)); } } }
ErrorCopier::~ErrorCopier() { JSContext* cx = ac->context(); // The provenance of Debugger.DebuggeeWouldRun is the topmost locking // debugger compartment; it should not be copied around. if (ac->origin() != cx->compartment() && cx->isExceptionPending() && !cx->isThrowingDebuggeeWouldRun()) { RootedValue exc(cx); if (cx->getPendingException(&exc) && exc.isObject() && exc.toObject().is<ErrorObject>()) { cx->clearPendingException(); ac.reset(); Rooted<ErrorObject*> errObj(cx, &exc.toObject().as<ErrorObject>()); JSObject* copyobj = CopyErrorObject(cx, errObj); if (copyobj) cx->setPendingException(ObjectValue(*copyobj)); } } }
extern "C" void * js_InternalThrow(VMFrame &f) { JSContext *cx = f.cx; ExpandInlineFrames(cx->compartment); // The current frame may have an associated orphaned native, if the native // or SplatApplyArgs threw an exception. RemoveOrphanedNative(cx, f.fp()); JS_ASSERT(!f.fp()->finishedInInterpreter()); // Make sure sp is up to date. JS_ASSERT(&cx->regs() == &f.regs); jsbytecode *pc = NULL; for (;;) { if (cx->isExceptionPending()) { // Call the throw hook if necessary JSThrowHook handler = cx->runtime->debugHooks.throwHook; if (handler || !cx->compartment->getDebuggees().empty()) { Value rval; JSTrapStatus st = Debugger::onExceptionUnwind(cx, &rval); if (st == JSTRAP_CONTINUE && handler) { RootedScript fscript(cx, cx->fp()->script()); st = handler(cx, fscript, cx->regs().pc, &rval, cx->runtime->debugHooks.throwHookData); } switch (st) { case JSTRAP_ERROR: cx->clearPendingException(); break; case JSTRAP_CONTINUE: break; case JSTRAP_RETURN: cx->clearPendingException(); cx->fp()->setReturnValue(rval); return cx->jaegerRuntime().forceReturnFromExternC(); case JSTRAP_THROW: cx->setPendingException(rval); break; default: JS_NOT_REACHED("bad onExceptionUnwind status"); } } } pc = FindExceptionHandler(cx); if (pc) break; // The JIT guarantees that ScriptDebugEpilogue() and ScriptEpilogue() // have always been run upon exiting to its caller. This is important // for consistency, where execution modes make similar guarantees about // prologues and epilogues. Interpret(), and Invoke() all rely on this // property. JS_ASSERT(!f.fp()->finishedInInterpreter()); UnwindScope(cx, 0); f.regs.setToEndOfScript(); if (cx->compartment->debugMode()) { // This can turn a throw or error into a healthy return. Note that // we will run ScriptDebugEpilogue again (from AnyFrameEpilogue); // ScriptDebugEpilogue is prepared for this eventuality. if (js::ScriptDebugEpilogue(cx, f.fp(), false)) return cx->jaegerRuntime().forceReturnFromExternC(); } f.fp()->epilogue(f.cx); // Don't remove the last frame, this is the responsibility of // JaegerShot()'s caller. We only guarantee that ScriptEpilogue() // has been run. if (f.entryfp == f.fp()) break; f.cx->stack.popInlineFrame(f.regs); DebugOnly<JSOp> op = JSOp(*f.regs.pc); JS_ASSERT(op == JSOP_CALL || op == JSOP_NEW || op == JSOP_EVAL || op == JSOP_FUNCALL || op == JSOP_FUNAPPLY); f.regs.pc += JSOP_CALL_LENGTH; } JS_ASSERT(&cx->regs() == &f.regs); if (!pc) return NULL; StackFrame *fp = cx->fp(); RootedScript script(cx, fp->script()); /* * Fall back to EnterMethodJIT and finish the frame in the interpreter. * With type inference enabled, we may wipe out all JIT code on the * stack without patching ncode values to jump to the interpreter, and * thus can only enter JIT code via EnterMethodJIT (which overwrites * its entry frame's ncode). See ClearAllFrames. */ cx->jaegerRuntime().setLastUnfinished(Jaeger_Unfinished); if (!JSScript::ensureRanAnalysis(cx, script)) { js_ReportOutOfMemory(cx); return NULL; } analyze::AutoEnterAnalysis enter(cx); /* * Interpret the ENTERBLOCK and EXCEPTION opcodes, so that we don't go * back into the interpreter with a pending exception. This will cause * it to immediately rethrow. */ if (cx->isExceptionPending()) { JS_ASSERT(JSOp(*pc) == JSOP_ENTERBLOCK); StaticBlockObject &blockObj = script->getObject(GET_UINT32_INDEX(pc))->asStaticBlock(); Value *vp = cx->regs().sp + blockObj.slotCount(); SetValueRangeToUndefined(cx->regs().sp, vp); cx->regs().sp = vp; if (!cx->regs().fp()->pushBlock(cx, blockObj)) return NULL; JS_ASSERT(JSOp(pc[JSOP_ENTERBLOCK_LENGTH]) == JSOP_EXCEPTION); cx->regs().sp[0] = cx->getPendingException(); cx->clearPendingException(); cx->regs().sp++; cx->regs().pc = pc + JSOP_ENTERBLOCK_LENGTH + JSOP_EXCEPTION_LENGTH; } *f.oldregs = f.regs; return NULL; }
extern "C" void * js_InternalThrow(VMFrame &f) { JSContext *cx = f.cx; ExpandInlineFrames(cx->compartment); // The current frame may have an associated orphaned native, if the native // or SplatApplyArgs threw an exception. RemoveOrphanedNative(cx, f.fp()); JS_ASSERT(!f.fp()->finishedInInterpreter()); // Make sure sp is up to date. JS_ASSERT(&cx->regs() == &f.regs); jsbytecode *pc = NULL; for (;;) { if (cx->isExceptionPending()) { // Call the throw hook if necessary JSThrowHook handler = cx->debugHooks->throwHook; if (handler || !cx->compartment->getDebuggees().empty()) { Value rval; JSTrapStatus st = Debugger::onExceptionUnwind(cx, &rval); if (st == JSTRAP_CONTINUE && handler) { st = handler(cx, cx->fp()->script(), cx->regs().pc, &rval, cx->debugHooks->throwHookData); } switch (st) { case JSTRAP_ERROR: cx->clearPendingException(); return NULL; case JSTRAP_CONTINUE: break; case JSTRAP_RETURN: cx->clearPendingException(); cx->fp()->setReturnValue(rval); return cx->jaegerCompartment()->forceReturnFromExternC(); case JSTRAP_THROW: cx->setPendingException(rval); break; default: JS_NOT_REACHED("bad onExceptionUnwind status"); } } } pc = FindExceptionHandler(cx); if (pc) break; // The JIT guarantees that ScriptEpilogue() has always been run // upon exiting to its caller. This is important for consistency, // where execution modes make similar guarantees about prologues // and epilogues. RunTracer(), Interpret(), and Invoke() all // rely on this property. JS_ASSERT(!f.fp()->finishedInInterpreter()); UnwindScope(cx, 0, cx->isExceptionPending()); if (cx->compartment->debugMode()) js::ScriptDebugEpilogue(cx, f.fp(), false); ScriptEpilogue(f.cx, f.fp(), false); // Don't remove the last frame, this is the responsibility of // JaegerShot()'s caller. We only guarantee that ScriptEpilogue() // has been run. if (f.entryfp == f.fp()) break; JS_ASSERT(f.regs.sp == cx->regs().sp); InlineReturn(f); } JS_ASSERT(f.regs.sp == cx->regs().sp); if (!pc) return NULL; StackFrame *fp = cx->fp(); JSScript *script = fp->script(); /* * Fall back to EnterMethodJIT and finish the frame in the interpreter. * With type inference enabled, we may wipe out all JIT code on the * stack without patching ncode values to jump to the interpreter, and * thus can only enter JIT code via EnterMethodJIT (which overwrites * its entry frame's ncode). See ClearAllFrames. */ cx->compartment->jaegerCompartment()->setLastUnfinished(Jaeger_Unfinished); if (!script->ensureRanAnalysis(cx, NULL)) { js_ReportOutOfMemory(cx); return NULL; } analyze::AutoEnterAnalysis enter(cx); cx->regs().pc = pc; cx->regs().sp = fp->base() + script->analysis()->getCode(pc).stackDepth; /* * Interpret the ENTERBLOCK and EXCEPTION opcodes, so that we don't go * back into the interpreter with a pending exception. This will cause * it to immediately rethrow. */ if (cx->isExceptionPending()) { JS_ASSERT(JSOp(*pc) == JSOP_ENTERBLOCK); JSObject *obj = script->getObject(GET_SLOTNO(pc)); Value *vp = cx->regs().sp + OBJ_BLOCK_COUNT(cx, obj); SetValueRangeToUndefined(cx->regs().sp, vp); cx->regs().sp = vp; JS_ASSERT(JSOp(pc[JSOP_ENTERBLOCK_LENGTH]) == JSOP_EXCEPTION); cx->regs().sp[0] = cx->getPendingException(); cx->clearPendingException(); cx->regs().sp++; cx->regs().pc = pc + JSOP_ENTERBLOCK_LENGTH + JSOP_EXCEPTION_LENGTH; } *f.oldregs = f.regs; return NULL; }