Add m-esr52 at 52.6.0

1 files changed, 125 insertions, 0 deletions

diff --git a/js/src/jsexn.h b/js/src/jsexn.h
new file mode 100644
index 000000000..a63c70909
--- /dev/null
+++ b/js/src/jsexn.h
@@ -0,0 +1,125 @@
+/* -*- 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/. */
+
+/*
+ * JS runtime exception classes.
+ */
+
+#ifndef jsexn_h
+#define jsexn_h
+
+#include "jsapi.h"
+#include "jscntxt.h"
+#include "NamespaceImports.h"
+
+namespace js {
+class ErrorObject;
+
+JSErrorReport*
+CopyErrorReport(JSContext* cx, JSErrorReport* report);
+
+JSString*
+ComputeStackString(JSContext* cx);
+
+/*
+ * Given a JSErrorReport, check to see if there is an exception associated with
+ * the error number.  If there is, then create an appropriate exception object,
+ * set it as the pending exception, and set the JSREPORT_EXCEPTION flag on the
+ * error report.
+ *
+ * It's possible we fail (due to OOM or some other error) and end up setting
+ * cx->exception to a different exception. The original error described by
+ * *reportp typically won't be reported anywhere in this case.
+ *
+ * If the error code is unrecognized, or if we decided to do nothing in order to
+ * avoid recursion, we simply return and this error is just being swept under
+ * the rug.
+ */
+extern void
+ErrorToException(JSContext* cx, JSErrorReport* reportp,
+                 JSErrorCallback callback, void* userRef);
+
+extern JSErrorReport*
+ErrorFromException(JSContext* cx, HandleObject obj);
+
+/*
+ * Make a copy of errobj parented to cx's compartment's global.
+ *
+ * errobj may be in a different compartment than cx, but it must be an Error
+ * object (not a wrapper of one) and it must not be one of the standard error
+ * prototype objects (errobj->getPrivate() must not be nullptr).
+ */
+extern JSObject*
+CopyErrorObject(JSContext* cx, JS::Handle<ErrorObject*> errobj);
+
+static_assert(JSEXN_ERR == 0 &&
+              JSProto_Error + JSEXN_INTERNALERR == JSProto_InternalError &&
+              JSProto_Error + JSEXN_EVALERR == JSProto_EvalError &&
+              JSProto_Error + JSEXN_RANGEERR == JSProto_RangeError &&
+              JSProto_Error + JSEXN_REFERENCEERR == JSProto_ReferenceError &&
+              JSProto_Error + JSEXN_SYNTAXERR == JSProto_SyntaxError &&
+              JSProto_Error + JSEXN_TYPEERR == JSProto_TypeError &&
+              JSProto_Error + JSEXN_URIERR == JSProto_URIError &&
+              JSProto_Error + JSEXN_DEBUGGEEWOULDRUN == JSProto_DebuggeeWouldRun &&
+              JSProto_Error + JSEXN_WASMCOMPILEERROR == JSProto_CompileError &&
+              JSProto_Error + JSEXN_WASMRUNTIMEERROR == JSProto_RuntimeError &&
+              JSEXN_WASMRUNTIMEERROR + 1 == JSEXN_WARN &&
+              JSEXN_WARN + 1 == JSEXN_LIMIT,
+              "GetExceptionProtoKey and ExnTypeFromProtoKey require that "
+              "each corresponding JSExnType and JSProtoKey value be separated "
+              "by the same constant value");
+
+static inline JSProtoKey
+GetExceptionProtoKey(JSExnType exn)
+{
+    MOZ_ASSERT(JSEXN_ERR <= exn);
+    MOZ_ASSERT(exn < JSEXN_WARN);
+    return JSProtoKey(JSProto_Error + int(exn));
+}
+
+static inline JSExnType
+ExnTypeFromProtoKey(JSProtoKey key)
+{
+    JSExnType type = static_cast<JSExnType>(key - JSProto_Error);
+    MOZ_ASSERT(type >= JSEXN_ERR);
+    MOZ_ASSERT(type < JSEXN_WARN);
+    return type;
+}
+
+class AutoClearPendingException
+{
+    JSContext* cx;
+
+  public:
+    explicit AutoClearPendingException(JSContext* cxArg)
+      : cx(cxArg)
+    { }
+
+    ~AutoClearPendingException() {
+        JS_ClearPendingException(cx);
+    }
+};
+
+class AutoAssertNoPendingException
+{
+    mozilla::DebugOnly<JSContext*> cx;
+
+  public:
+    explicit AutoAssertNoPendingException(JSContext* cxArg)
+      : cx(cxArg)
+    { }
+
+    ~AutoAssertNoPendingException() {
+        MOZ_ASSERT(!JS_IsExceptionPending(cx));
+    }
+};
+
+extern const char*
+ValueToSourceForError(JSContext* cx, HandleValue val, JSAutoByteString& bytes);
+
+} // namespace js
+
+#endif /* jsexn_h */