Fix toSource on exception objects so it uses toSource to generate properly-quoted, embedded string literals for message and filename (bug 96284, r=jband, sr=shaver, a=asa).

js/src/jsexn.c

@@ -348,7 +348,7 @@ Exception(JSContext *cx, JSObject *obj, uintN argc, jsval *argv, jsval *rval)
         OBJ_SET_SLOT(cx, obj, JSSLOT_PRIVATE, JSVAL_NULL);
 
     /* Set the 'message' property. */
-    if (argc > 0) {
+    if (argc != 0) {
         message = js_ValueToString(cx, argv[0]);
         if (!message)
             return JS_FALSE;
@@ -414,7 +414,7 @@ exn_toString(JSContext *cx, JSObject *obj, uintN argc, jsval *argv, jsval *rval)
         return JS_FALSE;
     }
 
-    if (message->length > 0) {
+    if (message->length != 0) {
         length = name->length + message->length + 2;
         cp = chars = (jschar*) JS_malloc(cx, (length + 1) * sizeof(jschar));
         if (!chars)
@@ -460,12 +460,12 @@ exn_toSource(JSContext *cx, JSObject *obj, uintN argc, jsval *argv, jsval *rval)
         return JS_FALSE;
 
     if (!JS_GetProperty(cx, obj, js_message_str, &v) ||
-        !(message = js_ValueToString(cx, v))) {
+        !(message = js_ValueToSource(cx, v))) {
         return JS_FALSE;
     }
 
     if (!JS_GetProperty(cx, obj, js_filename_str, &v) ||
-        !(filename = js_ValueToString(cx, v))) {
+        !(filename = js_ValueToSource(cx, v))) {
         return JS_FALSE;
     }
 
@@ -482,12 +482,12 @@ exn_toSource(JSContext *cx, JSObject *obj, uintN argc, jsval *argv, jsval *rval)
         lineno_as_str = NULL;
     }
 
-    length = (message->length > 0) ? name->length + message->length + 10
-        : name->length + 8;
+    /* Magic 8, for the characters in ``(new ())''. */
+    length = 8 + name->length + message->length;
 
-    if (filename->length > 0) {
-        /* append filename as ``, "{filename}"'' */
-        length += 4 + filename->length;
+    if (filename->length != 0) {
+        /* append filename as ``, {filename}'' */
+        length += 2 + filename->length;
         if (lineno_as_str) {
             /* append lineno as ``, {lineno_as_str}'' */
             length += 2 + lineno_as_str->length;
@@ -510,19 +510,16 @@ exn_toSource(JSContext *cx, JSObject *obj, uintN argc, jsval *argv, jsval *rval)
     js_strncpy(cp, name->chars, name->length);
     cp += name->length;
     *cp++ = '(';
-    if (message->length > 0) {
-        *cp++ = '"';
+    if (message->length != 0) {
         js_strncpy(cp, message->chars, message->length);
         cp += message->length;
-        *cp++ = '"';
     }
 
-    if (filename->length > 0) {
-        /* append filename as ``, "{filename}"'' */
-        *cp++ = ','; *cp++ = ' '; *cp++ = '"';
+    if (filename->length != 0) {
+        /* append filename as ``, {filename}'' */
+        *cp++ = ','; *cp++ = ' ';
         js_strncpy(cp, filename->chars, filename->length);
         cp += filename->length;
-        *cp++ = '"';
         if (lineno_as_str) {
             /* append lineno as ``, {lineno_as_str}'' */
             *cp++ = ','; *cp++ = ' ';
@@ -549,10 +546,6 @@ exn_toSource(JSContext *cx, JSObject *obj, uintN argc, jsval *argv, jsval *rval)
         JS_free(cx, chars);
         return JS_FALSE;
     }
-
-    result = js_QuoteString(cx, result, '"');
-    if (!result)
-        return JS_FALSE;
     *rval = STRING_TO_JSVAL(result);
     return JS_TRUE;
 }