js/xpconnect/src/XPCDebug.cpp

   1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /* vim: set ts=8 sts=4 et sw=4 tw=99: */
   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 "jsprf.h"
   9 #include "js/OldDebugAPI.h"
  10
  11 #ifdef XP_WIN
  12 #include <windows.h>
  13 #endif
  14
  15 static void DebugDump(const char* fmt, ...)
  16 {
  17   char buffer[2048];
  18   va_list ap;
  19   va_start(ap, fmt);
  20 #ifdef XPWIN
  21   _vsnprintf(buffer, sizeof(buffer), fmt, ap);
  22 #else
  23   vsnprintf(buffer, sizeof(buffer), fmt, ap);
  24 #endif
  25   buffer[sizeof(buffer)-1] = '\0';
  26   va_end(ap);
  27 #ifdef XP_WIN
  28   if (IsDebuggerPresent()) {
  29     OutputDebugStringA(buffer);
  30   }
  31 #endif
  32   printf("%s", buffer);
  33 }
  34
  35 bool
  36 xpc_DumpJSStack(JSContext* cx, bool showArgs, bool showLocals, bool showThisProps)
  37 {
  38     if (char* buf = xpc_PrintJSStack(cx, showArgs, showLocals, showThisProps)) {
  39         DebugDump("%s\n", buf);
  40         JS_smprintf_free(buf);
  41     }
  42     return true;
  43 }
  44
  45 char*
  46 xpc_PrintJSStack(JSContext* cx, bool showArgs, bool showLocals,
  47                  bool showThisProps)
  48 {
  49     JS::AutoSaveExceptionState state(cx);
  50
  51     char* buf = JS::FormatStackDump(cx, nullptr, showArgs, showLocals, showThisProps);
  52     if (!buf)
  53         DebugDump("%s", "Failed to format JavaScript stack for dump\n");
  54
  55     state.restore();
  56     return buf;
  57 }