xpcom/components/ManifestParser.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 "mozilla/ArrayUtils.h"
   8 #include "mozilla/Printf.h"
   9 #include "mozilla/UniquePtr.h"
  10
  11 #include "ManifestParser.h"
  12
  13 #include <string.h>
  14
  15 #include "prio.h"
  16 #if defined(XP_WIN)
  17 #  include <windows.h>
  18 #elif defined(MOZ_WIDGET_COCOA)
  19 #  include <CoreServices/CoreServices.h>
  20 #  include "nsCocoaFeatures.h"
  21 #elif defined(MOZ_WIDGET_GTK)
  22 #  include <gtk/gtk.h>
  23 #endif
  24
  25 #ifdef MOZ_WIDGET_ANDROID
  26 #  include "AndroidBuild.h"
  27 #  include "mozilla/java/GeckoAppShellWrappers.h"
  28 #endif
  29
  30 #ifdef MOZ_BACKGROUNDTASKS
  31 #  include "mozilla/BackgroundTasks.h"
  32 #endif
  33
  34 #include "mozilla/Services.h"
  35
  36 #include "nsCRT.h"
  37 #include "nsConsoleMessage.h"
  38 #include "nsTextFormatter.h"
  39 #include "nsVersionComparator.h"
  40 #include "nsXPCOMCIDInternal.h"
  41
  42 #include "nsIConsoleService.h"
  43 #include "nsIScriptError.h"
  44 #include "nsIXULAppInfo.h"
  45 #include "nsIXULRuntime.h"
  46
  47 using namespace mozilla;
  48
  49 struct ManifestDirective {
  50   const char* directive;
  51   int argc;
  52
  53   bool ischrome;
  54
  55   // The contentaccessible flags only apply to content/resource directives.
  56   bool contentflags;
  57
  58   // Function to handle this directive. This isn't a union because C++ still
  59   // hasn't learned how to initialize unions in a sane way.
  60   void (nsComponentManagerImpl::*mgrfunc)(
  61       nsComponentManagerImpl::ManifestProcessingContext& aCx, int aLineNo,
  62       char* const* aArgv);
  63   void (nsChromeRegistry::*regfunc)(
  64       nsChromeRegistry::ManifestProcessingContext& aCx, int aLineNo,
  65       char* const* aArgv, int aFlags);
  66 };
  67 static const ManifestDirective kParsingTable[] = {
  68     // clang-format off
  69   {
  70     "manifest",         1, true, false,
  71     &nsComponentManagerImpl::ManifestManifest, nullptr,
  72   },
  73   {
  74     "category",         3, false, false,
  75     &nsComponentManagerImpl::ManifestCategory, nullptr,
  76   },
  77   {
  78     "content",          2, true,  true,
  79     nullptr, &nsChromeRegistry::ManifestContent,
  80   },
  81   {
  82     "locale",           3, true, false,
  83     nullptr, &nsChromeRegistry::ManifestLocale,
  84   },
  85   {
  86     "skin",             3, true, false,
  87     nullptr, &nsChromeRegistry::ManifestSkin,
  88   },
  89   {
  90     // NB: note that while skin manifests can use this, they are only allowed
  91     // to use it for chrome://../skin/ URLs
  92     "override",         2, true, false,
  93     nullptr, &nsChromeRegistry::ManifestOverride,
  94   },
  95   {
  96     "resource",         2, false, true,
  97     nullptr, &nsChromeRegistry::ManifestResource,
  98   }
  99     // clang-format on
 100 };
 101
 102 static const char kWhitespace[] = "\t ";
 103
 104 static bool IsNewline(char aChar) { return aChar == '\n' || aChar == '\r'; }
 105
 106 void LogMessage(const char* aMsg, ...) {
 107   MOZ_ASSERT(nsComponentManagerImpl::gComponentManager);
 108
 109   nsCOMPtr<nsIConsoleService> console =
 110       do_GetService(NS_CONSOLESERVICE_CONTRACTID);
 111   if (!console) {
 112     return;
 113   }
 114
 115   va_list args;
 116   va_start(args, aMsg);
 117   SmprintfPointer formatted(mozilla::Vsmprintf(aMsg, args));
 118   va_end(args);
 119
 120   nsCOMPtr<nsIConsoleMessage> error =
 121       new nsConsoleMessage(NS_ConvertUTF8toUTF16(formatted.get()));
 122   console->LogMessage(error);
 123 }
 124
 125 void LogMessageWithContext(FileLocation& aFile, uint32_t aLineNumber,
 126                            const char* aMsg, ...) {
 127   va_list args;
 128   va_start(args, aMsg);
 129   SmprintfPointer formatted(mozilla::Vsmprintf(aMsg, args));
 130   va_end(args);
 131   if (!formatted) {
 132     return;
 133   }
 134
 135   MOZ_ASSERT(nsComponentManagerImpl::gComponentManager);
 136
 137   nsCString file;
 138   aFile.GetURIString(file);
 139
 140   nsCOMPtr<nsIScriptError> error = do_CreateInstance(NS_SCRIPTERROR_CONTRACTID);
 141   if (!error) {
 142     // This can happen early in component registration. Fall back to a
 143     // generic console message.
 144     LogMessage("Warning: in '%s', line %i: %s", file.get(), aLineNumber,
 145                formatted.get());
 146     return;
 147   }
 148
 149   nsCOMPtr<nsIConsoleService> console =
 150       do_GetService(NS_CONSOLESERVICE_CONTRACTID);
 151   if (!console) {
 152     return;
 153   }
 154
 155   nsresult rv = error->Init(
 156       NS_ConvertUTF8toUTF16(formatted.get()), file, aLineNumber, 0,
 157       nsIScriptError::warningFlag, "chrome registration"_ns,
 158       false /* from private window */, true /* from chrome context */);
 159   if (NS_FAILED(rv)) {
 160     return;
 161   }
 162
 163   console->LogMessage(error);
 164 }
 165
 166 /**
 167  * Check for a modifier flag of the following forms:
 168  *   "flag"   (same as "true")
 169  *   "flag=yes|true|1"
 170  *   "flag="no|false|0"
 171  * @param aFlag The flag to compare.
 172  * @param aData The tokenized data to check; this is lowercased
 173  *              before being passed in.
 174  * @param aResult If the flag is found, the value is assigned here.
 175  * @return Whether the flag was handled.
 176  */
 177 static bool CheckFlag(const nsAString& aFlag, const nsAString& aData,
 178                       bool& aResult) {
 179   if (!StringBeginsWith(aData, aFlag)) {
 180     return false;
 181   }
 182
 183   if (aFlag.Length() == aData.Length()) {
 184     // the data is simply "flag", which is the same as "flag=yes"
 185     aResult = true;
 186     return true;
 187   }
 188
 189   if (aData.CharAt(aFlag.Length()) != '=') {
 190     // the data is "flag2=", which is not anything we care about
 191     return false;
 192   }
 193
 194   if (aData.Length() == aFlag.Length() + 1) {
 195     aResult = false;
 196     return true;
 197   }
 198
 199   switch (aData.CharAt(aFlag.Length() + 1)) {
 200     case '1':
 201     case 't':  // true
 202     case 'y':  // yes
 203       aResult = true;
 204       return true;
 205
 206     case '0':
 207     case 'f':  // false
 208     case 'n':  // no
 209       aResult = false;
 210       return true;
 211   }
 212
 213   return false;
 214 }
 215
 216 enum TriState { eUnspecified, eBad, eOK };
 217
 218 /**
 219  * Check for a modifier flag of the following form:
 220  *   "flag=string"
 221  *   "flag!=string"
 222  * @param aFlag The flag to compare.
 223  * @param aData The tokenized data to check; this is lowercased
 224  *              before being passed in.
 225  * @param aValue The value that is expected.
 226  * @param aResult If this is "ok" when passed in, this is left alone.
 227  *                Otherwise if the flag is found it is set to eBad or eOK.
 228  * @return Whether the flag was handled.
 229  */
 230 static bool CheckStringFlag(const nsAString& aFlag, const nsAString& aData,
 231                             const nsAString& aValue, TriState& aResult) {
 232   if (aData.Length() < aFlag.Length() + 1) {
 233     return false;
 234   }
 235
 236   if (!StringBeginsWith(aData, aFlag)) {
 237     return false;
 238   }
 239
 240   bool comparison = true;
 241   if (aData[aFlag.Length()] != '=') {
 242     if (aData[aFlag.Length()] == '!' && aData.Length() >= aFlag.Length() + 2 &&
 243         aData[aFlag.Length() + 1] == '=') {
 244       comparison = false;
 245     } else {
 246       return false;
 247     }
 248   }
 249
 250   if (aResult != eOK) {
 251     nsDependentSubstring testdata =
 252         Substring(aData, aFlag.Length() + (comparison ? 1 : 2));
 253     if (testdata.Equals(aValue)) {
 254       aResult = comparison ? eOK : eBad;
 255     } else {
 256       aResult = comparison ? eBad : eOK;
 257     }
 258   }
 259
 260   return true;
 261 }
 262
 263 static bool CheckOsFlag(const nsAString& aFlag, const nsAString& aData,
 264                         const nsAString& aValue, TriState& aResult) {
 265   bool result = CheckStringFlag(aFlag, aData, aValue, aResult);
 266 #if defined(XP_UNIX) && !defined(XP_DARWIN) && !defined(ANDROID)
 267   if (result && aResult == eBad) {
 268     result = CheckStringFlag(aFlag, aData, u"likeunix"_ns, aResult);
 269   }
 270 #endif
 271   return result;
 272 }
 273
 274 /**
 275  * Check for a modifier flag of the following form:
 276  *   "flag=version"
 277  *   "flag<=version"
 278  *   "flag<version"
 279  *   "flag>=version"
 280  *   "flag>version"
 281  * @param aFlag The flag to compare.
 282  * @param aData The tokenized data to check; this is lowercased
 283  *              before being passed in.
 284  * @param aValue The value that is expected. If this is empty then no
 285  *               comparison will match.
 286  * @param aResult If this is eOK when passed in, this is left alone.
 287  *                Otherwise if the flag is found it is set to eBad or eOK.
 288  * @return Whether the flag was handled.
 289  */
 290
 291 #define COMPARE_EQ 1 << 0
 292 #define COMPARE_LT 1 << 1
 293 #define COMPARE_GT 1 << 2
 294
 295 static bool CheckVersionFlag(const nsString& aFlag, const nsString& aData,
 296                              const nsString& aValue, TriState& aResult) {
 297   if (aData.Length() < aFlag.Length() + 2) {
 298     return false;
 299   }
 300
 301   if (!StringBeginsWith(aData, aFlag)) {
 302     return false;
 303   }
 304
 305   if (aValue.Length() == 0) {
 306     if (aResult != eOK) {
 307       aResult = eBad;
 308     }
 309     return true;
 310   }
 311
 312   uint32_t comparison;
 313   nsAutoString testdata;
 314
 315   switch (aData[aFlag.Length()]) {
 316     case '=':
 317       comparison = COMPARE_EQ;
 318       testdata = Substring(aData, aFlag.Length() + 1);
 319       break;
 320
 321     case '<':
 322       if (aData[aFlag.Length() + 1] == '=') {
 323         comparison = COMPARE_EQ | COMPARE_LT;
 324         testdata = Substring(aData, aFlag.Length() + 2);
 325       } else {
 326         comparison = COMPARE_LT;
 327         testdata = Substring(aData, aFlag.Length() + 1);
 328       }
 329       break;
 330
 331     case '>':
 332       if (aData[aFlag.Length() + 1] == '=') {
 333         comparison = COMPARE_EQ | COMPARE_GT;
 334         testdata = Substring(aData, aFlag.Length() + 2);
 335       } else {
 336         comparison = COMPARE_GT;
 337         testdata = Substring(aData, aFlag.Length() + 1);
 338       }
 339       break;
 340
 341     default:
 342       return false;
 343   }
 344
 345   if (testdata.Length() == 0) {
 346     return false;
 347   }
 348
 349   if (aResult != eOK) {
 350     int32_t c = mozilla::CompareVersions(NS_ConvertUTF16toUTF8(aValue).get(),
 351                                          NS_ConvertUTF16toUTF8(testdata).get());
 352     if ((c == 0 && comparison & COMPARE_EQ) ||
 353         (c < 0 && comparison & COMPARE_LT) ||
 354         (c > 0 && comparison & COMPARE_GT)) {
 355       aResult = eOK;
 356     } else {
 357       aResult = eBad;
 358     }
 359   }
 360
 361   return true;
 362 }
 363
 364 // In-place conversion of ascii characters to lower case
 365 static void ToLowerCase(char* aToken) {
 366   for (; *aToken; ++aToken) {
 367     *aToken = NS_ToLower(*aToken);
 368   }
 369 }
 370
 371 namespace {
 372
 373 struct CachedDirective {
 374   int lineno;
 375   char* argv[4];
 376 };
 377
 378 }  // namespace
 379
 380 void ParseManifest(NSLocationType aType, FileLocation& aFile, char* aBuf,
 381                    bool aChromeOnly) {
 382   nsComponentManagerImpl::ManifestProcessingContext mgrcx(aType, aFile,
 383                                                           aChromeOnly);
 384   nsChromeRegistry::ManifestProcessingContext chromecx(aType, aFile);
 385   nsresult rv;
 386
 387   constexpr auto kContentAccessible = u"contentaccessible"_ns;
 388   constexpr auto kRemoteEnabled = u"remoteenabled"_ns;
 389   constexpr auto kRemoteRequired = u"remoterequired"_ns;
 390   constexpr auto kApplication = u"application"_ns;
 391   constexpr auto kAppVersion = u"appversion"_ns;
 392   constexpr auto kGeckoVersion = u"platformversion"_ns;
 393   constexpr auto kOs = u"os"_ns;
 394   constexpr auto kOsVersion = u"osversion"_ns;
 395   constexpr auto kABI = u"abi"_ns;
 396   constexpr auto kProcess = u"process"_ns;
 397 #if defined(MOZ_WIDGET_ANDROID)
 398   constexpr auto kTablet = u"tablet"_ns;
 399 #endif
 400   // You might expect this to be guarded by MOZ_BACKGROUNDTASKS, but it's not
 401   // possible to have conditional manifest contents, so we need to recognize and
 402   // discard these tokens even when MOZ_BACKGROUNDTASKS is not set.
 403   constexpr auto kBackgroundTask = u"backgroundtask"_ns;
 404
 405   constexpr auto kMain = u"main"_ns;
 406   constexpr auto kContent = u"content"_ns;
 407
 408   // Obsolete
 409   constexpr auto kXPCNativeWrappers = u"xpcnativewrappers"_ns;
 410
 411   nsAutoString appID;
 412   nsAutoString appVersion;
 413   nsAutoString geckoVersion;
 414   nsAutoString osTarget;
 415   nsAutoString abi;
 416   nsAutoString process;
 417
 418   nsCOMPtr<nsIXULAppInfo> xapp(do_GetService(XULAPPINFO_SERVICE_CONTRACTID));
 419   if (xapp) {
 420     nsAutoCString s;
 421     rv = xapp->GetID(s);
 422     if (NS_SUCCEEDED(rv)) {
 423       CopyUTF8toUTF16(s, appID);
 424     }
 425
 426     rv = xapp->GetVersion(s);
 427     if (NS_SUCCEEDED(rv)) {
 428       CopyUTF8toUTF16(s, appVersion);
 429     }
 430
 431     rv = xapp->GetPlatformVersion(s);
 432     if (NS_SUCCEEDED(rv)) {
 433       CopyUTF8toUTF16(s, geckoVersion);
 434     }
 435
 436     nsCOMPtr<nsIXULRuntime> xruntime(do_QueryInterface(xapp));
 437     if (xruntime) {
 438       rv = xruntime->GetOS(s);
 439       if (NS_SUCCEEDED(rv)) {
 440         ToLowerCase(s);
 441         CopyUTF8toUTF16(s, osTarget);
 442       }
 443
 444       rv = xruntime->GetXPCOMABI(s);
 445       if (NS_SUCCEEDED(rv) && osTarget.Length()) {
 446         ToLowerCase(s);
 447         CopyUTF8toUTF16(s, abi);
 448         abi.Insert(char16_t('_'), 0);
 449         abi.Insert(osTarget, 0);
 450       }
 451     }
 452   }
 453
 454   nsAutoString osVersion;
 455 #if defined(XP_WIN)
 456 #  pragma warning(push)
 457 #  pragma warning(disable : 4996)  // VC12+ deprecates GetVersionEx
 458   OSVERSIONINFO info = {sizeof(OSVERSIONINFO)};
 459   if (GetVersionEx(&info)) {
 460     nsTextFormatter::ssprintf(osVersion, u"%ld.%ld", info.dwMajorVersion,
 461                               info.dwMinorVersion);
 462   }
 463 #  pragma warning(pop)
 464 #elif defined(MOZ_WIDGET_COCOA)
 465   SInt32 majorVersion = nsCocoaFeatures::macOSVersionMajor();
 466   SInt32 minorVersion = nsCocoaFeatures::macOSVersionMinor();
 467   nsTextFormatter::ssprintf(osVersion, u"%ld.%ld", majorVersion, minorVersion);
 468 #elif defined(MOZ_WIDGET_GTK)
 469   nsTextFormatter::ssprintf(osVersion, u"%ld.%ld", gtk_major_version,
 470                             gtk_minor_version);
 471 #elif defined(MOZ_WIDGET_ANDROID)
 472   bool isTablet = false;
 473   if (jni::IsAvailable()) {
 474     jni::String::LocalRef release = java::sdk::Build::VERSION::RELEASE();
 475     osVersion.Assign(release->ToString());
 476     isTablet = java::GeckoAppShell::IsTablet();
 477   }
 478 #endif
 479
 480   if (XRE_IsContentProcess()) {
 481     process = kContent;
 482   } else {
 483     process = kMain;
 484   }
 485
 486   char* token;
 487   char* newline = aBuf;
 488   uint32_t line = 0;
 489
 490   // outer loop tokenizes by newline
 491   while (*newline) {
 492     while (*newline && IsNewline(*newline)) {
 493       ++newline;
 494       ++line;
 495     }
 496     if (!*newline) {
 497       break;
 498     }
 499
 500     token = newline;
 501     while (*newline && !IsNewline(*newline)) {
 502       ++newline;
 503     }
 504
 505     if (*newline) {
 506       *newline = '\0';
 507       ++newline;
 508     }
 509     ++line;
 510
 511     if (*token == '#') {  // ignore lines that begin with # as comments
 512       continue;
 513     }
 514
 515     char* whitespace = token;
 516     token = nsCRT::strtok(whitespace, kWhitespace, &whitespace);
 517     if (!token) {
 518       continue;
 519     }
 520
 521     const ManifestDirective* directive = nullptr;
 522     for (const ManifestDirective* d = kParsingTable;
 523          d < std::end(kParsingTable); ++d) {
 524       if (!strcmp(d->directive, token)) {
 525         directive = d;
 526         break;
 527       }
 528     }
 529
 530     if (!directive) {
 531       LogMessageWithContext(
 532           aFile, line, "Ignoring unrecognized chrome manifest directive '%s'.",
 533           token);
 534       continue;
 535     }
 536
 537     if (!directive->ischrome && NS_BOOTSTRAPPED_LOCATION == aType) {
 538       LogMessageWithContext(
 539           aFile, line,
 540           "Bootstrapped manifest not allowed to use '%s' directive.", token);
 541       continue;
 542     }
 543
 544     NS_ASSERTION(directive->argc < 4, "Need to reset argv array length");
 545     char* argv[4];
 546     for (int i = 0; i < directive->argc; ++i) {
 547       argv[i] = nsCRT::strtok(whitespace, kWhitespace, &whitespace);
 548     }
 549
 550     if (!argv[directive->argc - 1]) {
 551       LogMessageWithContext(aFile, line,
 552                             "Not enough arguments for chrome manifest "
 553                             "directive '%s', expected %i.",
 554                             token, directive->argc);
 555       continue;
 556     }
 557
 558     bool ok = true;
 559     TriState stAppVersion = eUnspecified;
 560     TriState stGeckoVersion = eUnspecified;
 561     TriState stApp = eUnspecified;
 562     TriState stOsVersion = eUnspecified;
 563     TriState stOs = eUnspecified;
 564     TriState stABI = eUnspecified;
 565     TriState stProcess = eUnspecified;
 566 #if defined(MOZ_WIDGET_ANDROID)
 567     TriState stTablet = eUnspecified;
 568 #endif
 569 #ifdef MOZ_BACKGROUNDTASKS
 570     // When in background task mode, default to not registering
 571     // category directivies unless backgroundtask=1 is specified.
 572     TriState stBackgroundTask = (BackgroundTasks::IsBackgroundTaskMode() &&
 573                                  strcmp("category", directive->directive) == 0)
 574                                     ? eBad
 575                                     : eUnspecified;
 576 #endif
 577     int flags = 0;
 578
 579     while ((token = nsCRT::strtok(whitespace, kWhitespace, &whitespace)) &&
 580            ok) {
 581       ToLowerCase(token);
 582       NS_ConvertASCIItoUTF16 wtoken(token);
 583
 584       if (CheckStringFlag(kApplication, wtoken, appID, stApp) ||
 585           CheckOsFlag(kOs, wtoken, osTarget, stOs) ||
 586           CheckStringFlag(kABI, wtoken, abi, stABI) ||
 587           CheckStringFlag(kProcess, wtoken, process, stProcess) ||
 588           CheckVersionFlag(kOsVersion, wtoken, osVersion, stOsVersion) ||
 589           CheckVersionFlag(kAppVersion, wtoken, appVersion, stAppVersion) ||
 590           CheckVersionFlag(kGeckoVersion, wtoken, geckoVersion,
 591                            stGeckoVersion)) {
 592         continue;
 593       }
 594
 595 #if defined(MOZ_WIDGET_ANDROID)
 596       bool tablet = false;
 597       if (CheckFlag(kTablet, wtoken, tablet)) {
 598         stTablet = (tablet == isTablet) ? eOK : eBad;
 599         continue;
 600       }
 601 #endif
 602
 603       // You might expect this to be guarded by MOZ_BACKGROUNDTASKS, it's not
 604       // possible to have conditional manifest contents.
 605       bool flag;
 606       if (CheckFlag(kBackgroundTask, wtoken, flag)) {
 607 #if defined(MOZ_BACKGROUNDTASKS)
 608         // Background task mode is active: filter.
 609         stBackgroundTask =
 610             (flag == BackgroundTasks::IsBackgroundTaskMode()) ? eOK : eBad;
 611 #endif /* defined(MOZ_BACKGROUNDTASKS) */
 612         continue;
 613       }
 614
 615       if (directive->contentflags) {
 616         bool flag;
 617         if (CheckFlag(kContentAccessible, wtoken, flag)) {
 618           if (flag) flags |= nsChromeRegistry::CONTENT_ACCESSIBLE;
 619           continue;
 620         }
 621         if (CheckFlag(kRemoteEnabled, wtoken, flag)) {
 622           if (flag) flags |= nsChromeRegistry::REMOTE_ALLOWED;
 623           continue;
 624         }
 625         if (CheckFlag(kRemoteRequired, wtoken, flag)) {
 626           if (flag) flags |= nsChromeRegistry::REMOTE_REQUIRED;
 627           continue;
 628         }
 629       }
 630
 631       bool xpcNativeWrappers = true;  // Dummy for CheckFlag.
 632       if (CheckFlag(kXPCNativeWrappers, wtoken, xpcNativeWrappers)) {
 633         LogMessageWithContext(
 634             aFile, line, "Ignoring obsolete chrome registration modifier '%s'.",
 635             token);
 636         continue;
 637       }
 638
 639       LogMessageWithContext(
 640           aFile, line, "Unrecognized chrome manifest modifier '%s'.", token);
 641       ok = false;
 642     }
 643
 644     if (!ok || stApp == eBad || stAppVersion == eBad ||
 645         stGeckoVersion == eBad || stOs == eBad || stOsVersion == eBad ||
 646 #ifdef MOZ_WIDGET_ANDROID
 647         stTablet == eBad ||
 648 #endif
 649 #ifdef MOZ_BACKGROUNDTASKS
 650         stBackgroundTask == eBad ||
 651 #endif
 652         stABI == eBad || stProcess == eBad) {
 653       continue;
 654     }
 655
 656     if (directive->regfunc) {
 657       if (GeckoProcessType_Default != XRE_GetProcessType()) {
 658         continue;
 659       }
 660
 661       if (!nsChromeRegistry::gChromeRegistry) {
 662         nsCOMPtr<nsIChromeRegistry> cr = mozilla::services::GetChromeRegistry();
 663         if (!nsChromeRegistry::gChromeRegistry) {
 664           LogMessageWithContext(aFile, line,
 665                                 "Chrome registry isn't available yet.");
 666           continue;
 667         }
 668       }
 669
 670       (nsChromeRegistry::gChromeRegistry->*(directive->regfunc))(chromecx, line,
 671                                                                  argv, flags);
 672     } else if (directive->ischrome || !aChromeOnly) {
 673       (nsComponentManagerImpl::gComponentManager->*(directive->mgrfunc))(
 674           mgrcx, line, argv);
 675     }
 676   }
 677 }