1 files changed, 123 insertions, 0 deletions
diff --git a/js/src/vm/ErrorObject.h b/js/src/vm/ErrorObject.h
new file mode 100644
index 000000000..32a691bb4
--- /dev/null
+++ b/js/src/vm/ErrorObject.h
@@ -0,0 +1,123 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
+ * vim: set ts=8 sts=4 et sw=4 tw=99:
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef vm_ErrorObject_h_
+#define vm_ErrorObject_h_
+
+#include "mozilla/ArrayUtils.h"
+
+#include "vm/NativeObject.h"
+#include "vm/SavedStacks.h"
+#include "vm/Shape.h"
+
+namespace js {
+
+/*
+ * Initialize the exception constructor/prototype hierarchy.
+ */
+extern JSObject*
+InitExceptionClasses(JSContext* cx, HandleObject obj);
+
+class ErrorObject : public NativeObject
+{
+    static JSObject*
+    createProto(JSContext* cx, JSProtoKey key);
+
+    static JSObject*
+    createConstructor(JSContext* cx, JSProtoKey key);
+
+    /* For access to createProto. */
+    friend JSObject*
+    js::InitExceptionClasses(JSContext* cx, HandleObject global);
+
+    static bool
+    init(JSContext* cx, Handle<ErrorObject*> obj, JSExnType type,
+         ScopedJSFreePtr<JSErrorReport>* errorReport, HandleString fileName, HandleObject stack,
+         uint32_t lineNumber, uint32_t columnNumber, HandleString message);
+
+    static const ClassSpec errorClassSpec_;
+    static const ClassSpec subErrorClassSpec_;
+    static const ClassSpec nonGlobalErrorClassSpec_;
+
+  protected:
+    static const uint32_t EXNTYPE_SLOT          = 0;
+    static const uint32_t STACK_SLOT            = EXNTYPE_SLOT + 1;
+    static const uint32_t ERROR_REPORT_SLOT     = STACK_SLOT + 1;
+    static const uint32_t FILENAME_SLOT         = ERROR_REPORT_SLOT + 1;
+    static const uint32_t LINENUMBER_SLOT       = FILENAME_SLOT + 1;
+    static const uint32_t COLUMNNUMBER_SLOT     = LINENUMBER_SLOT + 1;
+    static const uint32_t MESSAGE_SLOT          = COLUMNNUMBER_SLOT + 1;
+
+    static const uint32_t RESERVED_SLOTS = MESSAGE_SLOT + 1;
+
+  public:
+    static const Class classes[JSEXN_LIMIT];
+
+    static const Class * classForType(JSExnType type) {
+        MOZ_ASSERT(type < JSEXN_WARN);
+        return &classes[type];
+    }
+
+    static bool isErrorClass(const Class* clasp) {
+        return &classes[0] <= clasp && clasp < &classes[0] + mozilla::ArrayLength(classes);
+    }
+
+    // Create an error of the given type corresponding to the provided location
+    // info.  If |message| is non-null, then the error will have a .message
+    // property with that value; otherwise the error will have no .message
+    // property.
+    static ErrorObject*
+    create(JSContext* cx, JSExnType type, HandleObject stack, HandleString fileName,
+           uint32_t lineNumber, uint32_t columnNumber, ScopedJSFreePtr<JSErrorReport>* report,
+           HandleString message, HandleObject proto = nullptr);
+
+    /*
+     * Assign the initial error shape to the empty object.  (This shape does
+     * *not* include .message, which must be added separately if needed; see
+     * ErrorObject::init.)
+     */
+    static Shape*
+    assignInitialShape(ExclusiveContext* cx, Handle<ErrorObject*> obj);
+
+    JSExnType type() const {
+        return JSExnType(getReservedSlot(EXNTYPE_SLOT).toInt32());
+    }
+
+    JSErrorReport * getErrorReport() const {
+        const Value& slot = getReservedSlot(ERROR_REPORT_SLOT);
+        if (slot.isUndefined())
+            return nullptr;
+        return static_cast<JSErrorReport*>(slot.toPrivate());
+    }
+
+    JSErrorReport * getOrCreateErrorReport(JSContext* cx);
+
+    inline JSString * fileName(JSContext* cx) const;
+    inline uint32_t lineNumber() const;
+    inline uint32_t columnNumber() const;
+    inline JSObject * stack() const;
+
+    JSString * getMessage() const {
+        const HeapSlot& slot = getReservedSlotRef(MESSAGE_SLOT);
+        return slot.isString() ? slot.toString() : nullptr;
+    }
+
+    // Getter and setter for the Error.prototype.stack accessor.
+    static bool getStack(JSContext* cx, unsigned argc, Value* vp);
+    static bool setStack(JSContext* cx, unsigned argc, Value* vp);
+    static bool setStack_impl(JSContext* cx, const CallArgs& args);
+};
+
+} // namespace js
+
+template<>
+inline bool
+JSObject::is<js::ErrorObject>() const
+{
+    return js::ErrorObject::isErrorClass(getClass());
+}
+
+#endif // vm_ErrorObject_h_