1 files changed, 58 insertions, 0 deletions
diff --git a/js/xpconnect/src/XPCDebug.cpp b/js/xpconnect/src/XPCDebug.cpp
new file mode 100644
index 0000000000..25cf8758b2
--- /dev/null
+++ b/js/xpconnect/src/XPCDebug.cpp
@@ -0,0 +1,58 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* 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/. */
+
+#include "xpcprivate.h"
+#include "js/friend/DumpFunctions.h"  // JS::FormatStackDump
+#include "nsThreadUtils.h"
+#include "nsContentUtils.h"
+
+#include "mozilla/Sprintf.h"
+
+#ifdef XP_WIN
+#  include <windows.h>
+#  include "nsPrintfCString.h"
+#endif
+
+#ifdef ANDROID
+#  include <android/log.h>
+#endif
+
+static void DebugDump(const char* str) {
+#ifdef XP_WIN
+  if (IsDebuggerPresent()) {
+    nsPrintfCString output("%s\n", str);
+    OutputDebugStringA(output.get());
+  }
+#elif defined(ANDROID)
+  __android_log_print(ANDROID_LOG_DEBUG, "Gecko", "%s\n", str);
+#endif
+  printf("%s\n", str);
+}
+
+bool xpc_DumpJSStack(bool showArgs, bool showLocals, bool showThisProps) {
+  JSContext* cx = nsContentUtils::GetCurrentJSContext();
+  if (!cx) {
+    printf("there is no JSContext on the stack!\n");
+  } else if (JS::UniqueChars buf =
+                 xpc_PrintJSStack(cx, showArgs, showLocals, showThisProps)) {
+    DebugDump(buf.get());
+  }
+  return true;
+}
+
+JS::UniqueChars xpc_PrintJSStack(JSContext* cx, bool showArgs, bool showLocals,
+                                 bool showThisProps) {
+  JS::AutoSaveExceptionState state(cx);
+
+  JS::UniqueChars buf =
+      JS::FormatStackDump(cx, showArgs, showLocals, showThisProps);
+  if (!buf) {
+    DebugDump("Failed to format JavaScript stack for dump");
+  }
+
+  state.restore();
+  return buf;
+}