summaryrefslogtreecommitdiffstats
path: root/xpcom/base/ErrorNames.cpp
diff options
context:
space:
mode:
Diffstat (limited to '')
-rw-r--r--xpcom/base/ErrorNames.cpp78
1 files changed, 78 insertions, 0 deletions
diff --git a/xpcom/base/ErrorNames.cpp b/xpcom/base/ErrorNames.cpp
new file mode 100644
index 0000000000..42401aa860
--- /dev/null
+++ b/xpcom/base/ErrorNames.cpp
@@ -0,0 +1,78 @@
+/* -*- 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 "mozilla/ArrayUtils.h"
+#include "mozilla/ErrorNames.h"
+#include "nsString.h"
+#include "prerror.h"
+#include "MainThreadUtils.h"
+
+// Get the GetErrorNameInternal method
+#include "ErrorNamesInternal.h"
+
+namespace mozilla {
+
+const char* GetStaticErrorName(nsresult rv) { return GetErrorNameInternal(rv); }
+
+void GetErrorName(nsresult rv, nsACString& name) {
+ if (const char* errorName = GetErrorNameInternal(rv)) {
+ name.AssignASCII(errorName);
+ return;
+ }
+
+ bool isSecurityError = NS_ERROR_GET_MODULE(rv) == NS_ERROR_MODULE_SECURITY;
+
+ // NS_ERROR_MODULE_SECURITY is the only module that is "allowed" to
+ // synthesize nsresult error codes that are not listed in ErrorList.h. (The
+ // NS_ERROR_MODULE_SECURITY error codes are synthesized from NSPR error
+ // codes.)
+ MOZ_ASSERT(isSecurityError);
+
+ if (NS_SUCCEEDED(rv)) {
+ name.AssignLiteral("NS_ERROR_GENERATE_SUCCESS(");
+ } else {
+ name.AssignLiteral("NS_ERROR_GENERATE_FAILURE(");
+ }
+
+ if (isSecurityError) {
+ name.AppendLiteral("NS_ERROR_MODULE_SECURITY");
+ } else {
+ // This should never happen given the assertion above, so we don't bother
+ // trying to print a symbolic name for the module here.
+ name.AppendInt(NS_ERROR_GET_MODULE(rv));
+ }
+
+ name.AppendLiteral(", ");
+
+ const char* nsprName = nullptr;
+ if (isSecurityError && NS_IsMainThread()) {
+ // Invert the logic from NSSErrorsService::GetXPCOMFromNSSError
+ PRErrorCode nsprCode = -1 * static_cast<PRErrorCode>(NS_ERROR_GET_CODE(rv));
+ nsprName = PR_ErrorToName(nsprCode);
+
+ // All NSPR error codes defined by NSPR or NSS should have a name mapping.
+ MOZ_ASSERT(nsprName);
+ }
+
+ if (nsprName) {
+ name.AppendASCII(nsprName);
+ } else {
+ name.AppendInt(NS_ERROR_GET_CODE(rv));
+ }
+
+ name.AppendLiteral(")");
+}
+
+} // namespace mozilla
+
+extern "C" {
+
+// This is an extern "C" binding for the GetErrorName method which is used by
+// the nsresult rust bindings in xpcom/rust/nserror.
+void Gecko_GetErrorName(nsresult aRv, nsACString& aName) {
+ mozilla::GetErrorName(aRv, aName);
+}
+}