Bug Summary

File:Volumes/Data/worker/Apple-iOS-26-Safer-CPP-Checks-EWS/build/Source/WebCore/css/CSSImportRule.cpp
Warning:line 127, column 21
Local variable 'cachedSheet' is uncounted and unsafe

Annotated Source Code

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clang -cc1 -cc1 -triple arm64-apple-ios26.2.0-simulator -O3 -Wundef-prefix=TARGET_OS_ -Werror=undef-prefix -Wdeprecated-objc-isa-usage -Werror=deprecated-objc-isa-usage -Werror=implicit-function-declaration -analyze -disable-free -clear-ast-before-backend -disable-llvm-verifier -discard-value-names -main-file-name UnifiedSource138.cpp -analyzer-checker=core -analyzer-checker=apiModeling -analyzer-checker=unix -analyzer-checker=osx -analyzer-checker=security.insecureAPI.decodeValueOfObjCType -analyzer-checker=deadcode -analyzer-checker=cplusplus -analyzer-checker=security.insecureAPI.UncheckedReturn -analyzer-checker=security.insecureAPI.getpw -analyzer-checker=security.insecureAPI.gets -analyzer-checker=security.insecureAPI.mktemp -analyzer-checker=security.insecureAPI.mkstemp -analyzer-checker=security.insecureAPI.vfork -analyzer-checker=nullability.NullPassedToNonnull -analyzer-checker=nullability.NullReturnedFromNonnull -analyzer-output plist -w -setup-static-analyzer 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/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator26.2.sdk/usr/local/include -I /Volumes/Data/worker/Apple-iOS-26-Safer-CPP-Checks-EWS/build/WebKitBuild/Release-iphonesimulator/usr/local/include/webrtc -I /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator26.2.sdk/usr/local/include/webrtc -I /Volumes/Data/worker/Apple-iOS-26-Safer-CPP-Checks-EWS/build/WebKitBuild/Release-iphonesimulator/usr/local/include/webm -I /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator26.2.sdk/usr/local/include/webm -I /Volumes/Data/worker/Apple-iOS-26-Safer-CPP-Checks-EWS/build/WebKitBuild/PAL.build/PAL.build/DerivedSources -I /Volumes/Data/worker/Apple-iOS-26-Safer-CPP-Checks-EWS/build/WebKitBuild/PAL.build/Release-iphonesimulator/PAL.build/DerivedSources -I /Volumes/Data/worker/Apple-iOS-26-Safer-CPP-Checks-EWS/build/Source/WebCore -I /Volumes/Data/worker/Apple-iOS-26-Safer-CPP-Checks-EWS/build/WebKitBuild/WebCore.build/Release-iphonesimulator/WebCore.build/DerivedSources-normal/arm64 -I /Volumes/Data/worker/Apple-iOS-26-Safer-CPP-Checks-EWS/build/WebKitBuild/WebCore.build/Release-iphonesimulator/WebCore.build/DerivedSources/arm64 -I /Volumes/Data/worker/Apple-iOS-26-Safer-CPP-Checks-EWS/build/WebKitBuild/WebCore.build/Release-iphonesimulator/WebCore.build/DerivedSources -F/Volumes/Data/worker/Apple-iOS-26-Safer-CPP-Checks-EWS/build/WebKitBuild/Release-iphonesimulator -F/Volumes/Data/worker/Apple-iOS-26-Safer-CPP-Checks-EWS/build/WebKitBuild/Release-iphonesimulator -I/usr/local/include -stdlib=libc++ -internal-isystem /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator26.2.sdk/usr/include/c++/v1 -internal-isystem /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator26.2.sdk/usr/local/include 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optin.osx.cocoa.localizability.NonLocalizedStringChecker -analyzer-checker security.insecureAPI.UncheckedReturn -analyzer-checker security.insecureAPI.getpw -analyzer-checker security.insecureAPI.gets -analyzer-checker security.insecureAPI.mkstemp -analyzer-checker security.insecureAPI.mktemp -analyzer-disable-checker security.insecureAPI.rand -analyzer-disable-checker security.insecureAPI.strcpy -analyzer-checker security.insecureAPI.vfork -analyzer-disable-checker alpha,apiModeling,core,cplusplus,deadcode,debug,fuchsia,nullability,optin,osx,security,unix,webkit -analyzer-checker alpha.webkit.ForwardDeclChecker,alpha.webkit.MemoryUnsafeCastChecker,alpha.webkit.NoDeleteChecker,alpha.webkit.NoUncheckedPtrMemberChecker,alpha.webkit.NoUnretainedMemberChecker,alpha.webkit.RetainPtrCtorAdoptChecker,alpha.webkit.UncheckedCallArgsChecker,alpha.webkit.UncheckedLocalVarsChecker,alpha.webkit.UncountedCallArgsChecker,alpha.webkit.UncountedLocalVarsChecker,alpha.webkit.UnretainedCallArgsChecker,alpha.webkit.UnretainedLambdaCapturesChecker,alpha.webkit.UnretainedLocalVarsChecker,webkit.NoUncountedMemberChecker,webkit.RefCntblBaseVirtualDtor,webkit.UncountedLambdaCapturesChecker -analyzer-config max-nodes=10000000 -analyzer-config verbose-report-filename=true -fdwarf2-cfi-asm -o /Volumes/Data/worker/Apple-iOS-26-Safer-CPP-Checks-EWS/build/scan-build-output/StaticAnalyzer/WebCore/WebCore/normal/arm64/UnifiedSource138.plist -x c++ /Volumes/Data/worker/Apple-iOS-26-Safer-CPP-Checks-EWS/build/WebKitBuild/Release-iphonesimulator/DerivedSources/WebCore/unified-sources/UnifiedSource138.cpp
1/*
2 * (C) 1999-2003 Lars Knoll (knoll@kde.org)
3 * (C) 2002-2003 Dirk Mueller (mueller@kde.org)
4 * Copyright (C) 2002, 2005, 2006, 2008, 2009, 2010, 2012, 2013 Apple Inc. All rights reserved.
5 *
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Library General Public
8 * License as published by the Free Software Foundation; either
9 * version 2 of the License, or (at your option) any later version.
10 *
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Library General Public License for more details.
15 *
16 * You should have received a copy of the GNU Library General Public License
17 * along with this library; see the file COPYING.LIB. If not, write to
18 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
19 * Boston, MA 02110-1301, USA.
20 */
21
22#include "config.h"
23#include "CSSImportRule.h"
24
25#include "CSSLayerBlockRule.h"
26#include "CSSMarkup.h"
27#include "CSSSerializationContext.h"
28#include "CSSStyleSheet.h"
29#include "CachedCSSStyleSheet.h"
30#include "MediaList.h"
31#include "MediaQueryParser.h"
32#include "StyleRuleImport.h"
33#include "StyleSheetContents.h"
34#include <wtf/text/StringBuilder.h>
35
36namespace WebCore {
37
38CSSImportRule::CSSImportRule(StyleRuleImport& importRule, CSSStyleSheet* parent)
39 : CSSRule(parent)
40 , m_importRule(importRule)
41{
42}
43
44CSSImportRule::~CSSImportRule()
45{
46 if (m_styleSheetCSSOMWrapper)
47 protect(m_styleSheetCSSOMWrapper)->clearOwnerRule();
48 if (m_mediaCSSOMWrapper)
49 protect(m_mediaCSSOMWrapper)->detachFromParent();
50}
51
52String CSSImportRule::href() const
53{
54 return m_importRule.get().href();
55}
56
57MediaList& CSSImportRule::media() const
58{
59 if (!m_mediaCSSOMWrapper)
60 m_mediaCSSOMWrapper = MediaList::create(const_cast<CSSImportRule*>(this));
61 return *m_mediaCSSOMWrapper;
62}
63
64String CSSImportRule::layerName() const
65{
66 auto name = m_importRule->cascadeLayerName();
67 if (!name)
68 return { };
69
70 return stringFromCascadeLayerName(*name);
71}
72
73String CSSImportRule::supportsText() const
74{
75 return m_importRule->supportsText();
76}
77
78String CSSImportRule::cssTextInternal(const String& urlString) const
79{
80 StringBuilder builder;
81 builder.append("@import "_s, serializeURL(urlString));
82
83 if (auto layerName = this->layerName(); !layerName.isNull()) {
84 if (layerName.isEmpty())
85 builder.append(" layer"_s);
86 else
87 builder.append(" layer("_s, layerName, ')');
88 }
89
90 auto supports = supportsText();
91 if (!supports.isNull())
92 builder.append(" supports("_s, WTF::move(supports), ')');
93
94 if (!mediaQueries().isEmpty()) {
95 builder.append(' ');
96 MQ::serialize(builder, mediaQueries());
97 }
98
99 builder.append(';');
100 return builder.toString();
101}
102
103String CSSImportRule::cssText() const
104{
105 return cssTextInternal(m_importRule->href());
106}
107
108String CSSImportRule::cssText(const CSS::SerializationContext& context) const
109{
110 if (RefPtr sheet = styleSheet()) {
111 auto urlString = context.replacementURLStringsForCSSStyleSheet.get(*sheet);
112 if (!urlString.isEmpty())
113 return cssTextInternal(urlString);
114 }
115
116 auto urlString = m_importRule->href();
117 auto replacementURLString = context.replacementURLStrings.get(urlString);
118 return replacementURLString.isEmpty() ? cssTextInternal(urlString) : cssTextInternal(replacementURLString);
119}
120
121CSSStyleSheet* CSSImportRule::styleSheet() const
122{
123 if (!m_importRule.get().styleSheet())
124 return nullptr;
125
126 std::optional<bool> isOriginClean;
127 if (const auto* cachedSheet = m_importRule->cachedCSSStyleSheet())
Local variable 'cachedSheet' is uncounted and unsafe
128 isOriginClean = cachedSheet->isCORSSameOrigin();
129
130 if (!m_styleSheetCSSOMWrapper)
131 m_styleSheetCSSOMWrapper = CSSStyleSheet::create(*m_importRule.get().styleSheet(), const_cast<CSSImportRule*>(this), isOriginClean);
132 return m_styleSheetCSSOMWrapper.get();
133}
134
135void CSSImportRule::reattach(StyleRuleBase&)
136{
137 // FIXME: Implement when enabling caching for stylesheets with import rules.
138 ASSERT_NOT_REACHED()((void)0);
139}
140
141const MQ::MediaQueryList& CSSImportRule::mediaQueries() const
142{
143 return m_importRule->mediaQueries();
144}
145
146void CSSImportRule::setMediaQueries(MQ::MediaQueryList&& queries)
147{
148 m_importRule->setMediaQueries(WTF::move(queries));
149}
150
151void CSSImportRule::getChildStyleSheets(HashSet<Ref<CSSStyleSheet>>& childStyleSheets)
152{
153 RefPtr sheet = styleSheet();
154 if (!sheet)
155 return;
156
157 if (childStyleSheets.add(*sheet).isNewEntry)
158 sheet->getChildStyleSheets(childStyleSheets);
159}
160
161} // namespace WebCore