js/xpconnect/src/XPCDebug.cpp

   1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
   3 /* This Source Code Form is subject to the terms of the Mozilla Public
   4  * License, v. 2.0. If a copy of the MPL was not distributed with this
   5  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   6
   7 #include "xpcprivate.h"
   8 #include "js/friend/DumpFunctions.h"  // JS::FormatStackDump
   9 #include "nsThreadUtils.h"
  10 #include "nsContentUtils.h"
  11
  12 #include "mozilla/Sprintf.h"
  13
  14 #ifdef XP_WIN
  15 #  include <windows.h>
  16 #  include "nsPrintfCString.h"
  17 #endif
  18
  19 #ifdef ANDROID
  20 #  include <android/log.h>
  21 #endif
  22
  23 static void DebugDump(const char* str) {
  24 #ifdef XP_WIN
  25   if (IsDebuggerPresent()) {
  26     nsPrintfCString output("%s\n", str);
  27     OutputDebugStringA(output.get());
  28   }
  29 #elif defined(ANDROID)
  30   __android_log_print(ANDROID_LOG_DEBUG, "Gecko", "%s\n", str);
  31 #endif
  32   printf("%s\n", str);
  33 }
  34
  35 bool xpc_DumpJSStack(bool showArgs, bool showLocals, bool showThisProps) {
  36   JSContext* cx = nsContentUtils::GetCurrentJSContext();
  37   if (!cx) {
  38     printf("there is no JSContext on the stack!\n");
  39   } else if (JS::UniqueChars buf =
  40                  xpc_PrintJSStack(cx, showArgs, showLocals, showThisProps)) {
  41     DebugDump(buf.get());
  42   }
  43   return true;
  44 }
  45
  46 JS::UniqueChars xpc_PrintJSStack(JSContext* cx, bool showArgs, bool showLocals,
  47                                  bool showThisProps) {
  48   JS::AutoSaveExceptionState state(cx);
  49
  50   JS::UniqueChars buf =
  51       JS::FormatStackDump(cx, showArgs, showLocals, showThisProps);
  52   if (!buf) {
  53     DebugDump("Failed to format JavaScript stack for dump");
  54   }
  55
  56   state.restore();
  57   return buf;
  58 }