forked from mirrors/gecko-dev
679bde75eb
This will help JS codebase decipher what a given nsresult refers to. Differential Revision: https://phabricator.services.mozilla.com/D130879
78 lines
2.3 KiB
C++
78 lines
2.3 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "mozilla/ArrayUtils.h"
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#include "mozilla/ErrorNames.h"
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#include "nsString.h"
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#include "prerror.h"
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#include "MainThreadUtils.h"
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// Get the GetErrorNameInternal method
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#include "ErrorNamesInternal.h"
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namespace mozilla {
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const char* GetStaticErrorName(nsresult rv) { return GetErrorNameInternal(rv); }
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void GetErrorName(nsresult rv, nsACString& name) {
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if (const char* errorName = GetErrorNameInternal(rv)) {
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name.AssignASCII(errorName);
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return;
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}
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bool isSecurityError = NS_ERROR_GET_MODULE(rv) == NS_ERROR_MODULE_SECURITY;
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// NS_ERROR_MODULE_SECURITY is the only module that is "allowed" to
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// synthesize nsresult error codes that are not listed in ErrorList.h. (The
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// NS_ERROR_MODULE_SECURITY error codes are synthesized from NSPR error
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// codes.)
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MOZ_ASSERT(isSecurityError);
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if (NS_SUCCEEDED(rv)) {
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name.AssignLiteral("NS_ERROR_GENERATE_SUCCESS(");
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} else {
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name.AssignLiteral("NS_ERROR_GENERATE_FAILURE(");
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}
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if (isSecurityError) {
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name.AppendLiteral("NS_ERROR_MODULE_SECURITY");
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} else {
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// This should never happen given the assertion above, so we don't bother
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// trying to print a symbolic name for the module here.
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name.AppendInt(NS_ERROR_GET_MODULE(rv));
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}
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name.AppendLiteral(", ");
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const char* nsprName = nullptr;
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if (isSecurityError && NS_IsMainThread()) {
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// Invert the logic from NSSErrorsService::GetXPCOMFromNSSError
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PRErrorCode nsprCode = -1 * static_cast<PRErrorCode>(NS_ERROR_GET_CODE(rv));
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nsprName = PR_ErrorToName(nsprCode);
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// All NSPR error codes defined by NSPR or NSS should have a name mapping.
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MOZ_ASSERT(nsprName);
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}
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if (nsprName) {
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name.AppendASCII(nsprName);
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} else {
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name.AppendInt(NS_ERROR_GET_CODE(rv));
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}
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name.AppendLiteral(")");
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}
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} // namespace mozilla
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extern "C" {
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// This is an extern "C" binding for the GetErrorName method which is used by
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// the nsresult rust bindings in xpcom/rust/nserror.
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void Gecko_GetErrorName(nsresult aRv, nsACString& aName) {
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mozilla::GetErrorName(aRv, aName);
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}
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}
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