1 files changed, 140 insertions, 0 deletions
diff --git a/dom/webidl/ThreadSafeChromeUtils.webidl b/dom/webidl/ThreadSafeChromeUtils.webidl
new file mode 100644
index 000000000..8d0f21734
--- /dev/null
+++ b/dom/webidl/ThreadSafeChromeUtils.webidl
@@ -0,0 +1,140 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* 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/.
+ */
+
+/**
+ * A collection of **thread-safe** static utility methods that are only exposed
+ * to Chrome. This interface is exposed in workers, while ChromeUtils is not.
+ */
+[ChromeOnly, Exposed=(Window,System,Worker)]
+interface ThreadSafeChromeUtils {
+  /**
+   * Serialize a snapshot of the heap graph, as seen by |JS::ubi::Node| and
+   * restricted by |boundaries|, and write it to the provided file path.
+   *
+   * @param boundaries        The portion of the heap graph to write.
+   *
+   * @returns                 The path to the file the heap snapshot was written
+   *                          to. This is guaranteed to be within the temp
+   *                          directory and its file name will match the regexp
+   *                          `\d+(\-\d+)?\.fxsnapshot`.
+   */
+  [Throws]
+  static DOMString saveHeapSnapshot(optional HeapSnapshotBoundaries boundaries);
+
+  /**
+   * Deserialize a core dump into a HeapSnapshot.
+   *
+   * @param filePath          The file path to read the heap snapshot from.
+   */
+  [Throws, NewObject]
+  static HeapSnapshot readHeapSnapshot(DOMString filePath);
+
+  /**
+   * Return the keys in a weak map.  This operation is
+   * non-deterministic because it is affected by the scheduling of the
+   * garbage collector and the cycle collector.
+   *
+   * @param aMap weak map or other JavaScript value
+   * @returns If aMap is a weak map object, return the keys of the weak
+   *          map as an array.  Otherwise, return undefined.
+   */
+  [Throws, NewObject]
+  static any nondeterministicGetWeakMapKeys(any map);
+
+  /**
+   * Return the keys in a weak set.  This operation is
+   * non-deterministic because it is affected by the scheduling of the
+   * garbage collector and the cycle collector.
+   *
+   * @param aSet weak set or other JavaScript value
+   * @returns If aSet is a weak set object, return the keys of the weak
+   *          set as an array.  Otherwise, return undefined.
+   */
+  [Throws, NewObject]
+  static any nondeterministicGetWeakSetKeys(any aSet);
+
+  /**
+   * Converts a buffer to a Base64 URL-encoded string per RFC 4648.
+   *
+   * @param source The buffer to encode.
+   * @param options Additional encoding options.
+   * @returns The encoded string.
+   */
+  [Throws]
+  static ByteString base64URLEncode(BufferSource source,
+                                    Base64URLEncodeOptions options);
+
+  /**
+   * Decodes a Base64 URL-encoded string per RFC 4648.
+   *
+   * @param string The string to decode.
+   * @param options Additional decoding options.
+   * @returns The decoded buffer.
+   */
+  [Throws, NewObject]
+  static ArrayBuffer base64URLDecode(ByteString string,
+                                     Base64URLDecodeOptions options);
+};
+
+/**
+ * A JS object whose properties specify what portion of the heap graph to
+ * write. The recognized properties are:
+ *
+ * * globals: [ global, ... ]
+ *   Dump only nodes that either:
+ *   - belong in the compartment of one of the given globals;
+ *   - belong to no compartment, but do belong to a Zone that contains one of
+ *     the given globals;
+ *   - are referred to directly by one of the last two kinds of nodes; or
+ *   - is the fictional root node, described below.
+ *
+ * * debugger: Debugger object
+ *   Like "globals", but use the Debugger's debuggees as the globals.
+ *
+ * * runtime: true
+ *   Dump the entire heap graph, starting with the JSRuntime's roots.
+ *
+ * One, and only one, of these properties must exist on the boundaries object.
+ *
+ * The root of the dumped graph is a fictional node whose ubi::Node type name is
+ * "CoreDumpRoot". If we are dumping the entire ubi::Node graph, this root node
+ * has an edge for each of the JSRuntime's roots. If we are dumping a selected
+ * set of globals, the root has an edge to each global, and an edge for each
+ * incoming JS reference to the selected Zones.
+ */
+dictionary HeapSnapshotBoundaries {
+  sequence<object> globals;
+  object           debugger;
+  boolean          runtime;
+};
+
+dictionary Base64URLEncodeOptions {
+  /** Specifies whether the output should be padded with "=" characters. */
+  required boolean pad;
+};
+
+enum Base64URLDecodePadding {
+  /**
+   * Fails decoding if the input is unpadded. RFC 4648, section 3.2 requires
+   * padding, unless the referring specification prohibits it.
+   */
+  "require",
+
+  /** Tolerates padded and unpadded input. */
+  "ignore",
+
+  /**
+   * Fails decoding if the input is padded. This follows the strict base64url
+   * variant used in JWS (RFC 7515, Appendix C) and HTTP Encrypted
+   * Content-Encoding (draft-ietf-httpbis-encryption-encoding-01).
+   */
+  "reject"
+};
+
+dictionary Base64URLDecodeOptions {
+  /** Specifies the padding mode for decoding the input. */
+  required Base64URLDecodePadding padding;
+};