<div dir="ltr">Manman,<div><br></div><div>FYI, It appears that some of your ObjC commits today trigger asan error.</div><div>Sanitizer bots are broken by PR30341, so they don't report the issue yet.</div><div><br></div><div>--Artem</div><div><br></div><div><div>$ llvm/tools/clang/clang -cc1 -internal-isystem llvm/tools/clang/staging/include -nostdsysteminc -fblocks -fsyntax-only -Wnullable-to-nonnull-conversion llvm/tools/clang/test/SemaObjC/parameterized_classes_subst.m -verify</div><div>=================================================================</div><div>==223101==ERROR: AddressSanitizer: use-after-poison on address 0x621000091288 at pc 0x000001a02b3f bp 0x7fffff2996f0 sp 0x7fffff2996e8</div><div>WRITE of size 4 at 0x621000091288 thread T0</div><div> #0 0x1a02b3e in clang::ObjCTypeParamTypeLoc::setProtocolRAngleLoc(clang::SourceLocation) third_party/llvm/llvm/tools/clang/include/clang/AST/TypeLoc.h:737:55</div><div> #1 0x213f86b in clang::Sema::actOnObjCTypeArgsAndProtocolQualifiers(clang::Scope*, clang::SourceLocation, clang::OpaquePtr<clang::QualType>, clang::SourceLocation, llvm::ArrayRef<clang::OpaquePtr<clang::QualType> >, clang::SourceLocation, clang::SourceLocation, llvm::ArrayRef<clang::Decl*>, llvm::ArrayRef<clang::SourceLocation>, clang::SourceLocation) third_party/llvm/llvm/tools/clang/lib/Sema/SemaType.cpp:1165:13</div><div> #2 0x2060347 in clang::Parser::parseObjCTypeArgsAndProtocolQualifiers(clang::SourceLocation, clang::OpaquePtr<clang::QualType>, bool, clang::SourceLocation&) third_party/llvm/llvm/tools/clang/lib/Parse/ParseObjc.cpp:1878:18</div><div> #3 0x1ffca6f in clang::Parser::TryAnnotateTypeOrScopeTokenAfterScopeSpec(bool, bool, clang::CXXScopeSpec&, bool) third_party/llvm/llvm/tools/clang/lib/Parse/Parser.cpp:1770:13</div><div> #4 0x1ffd4fc in clang::Parser::TryAnnotateTypeOrScopeToken(bool, bool) third_party/llvm/llvm/tools/clang/lib/Parse/Parser.cpp:1733:10</div><div> #5 0x20df910 in clang::Parser::isTypeSpecifierQualifier() third_party/llvm/llvm/tools/clang/lib/Parse/ParseDecl.cpp:4381:9</div><div> #6 0x205ecf5 in clang::Parser::ParseObjCTypeName(clang::ObjCDeclSpec&, clang::Declarator::TheContext, clang::ParsedAttributes*) third_party/llvm/llvm/tools/clang/lib/Parse/ParseObjc.cpp:1274:7</div><div> #7 0x205c8f9 in clang::Parser::ParseObjCMethodDecl(clang::SourceLocation, clang::tok::TokenKind, clang::tok::ObjCKeywordKind, bool) third_party/llvm/llvm/tools/clang/lib/Parse/ParseObjc.cpp:1428:22</div><div> #8 0x2058e8b in clang::Parser::ParseObjCInterfaceDeclList(clang::tok::ObjCKeywordKind, clang::Decl*) third_party/llvm/llvm/tools/clang/lib/Parse/ParseObjc.cpp:633:11</div><div> #9 0x2053154 in clang::Parser::ParseObjCAtInterfaceDeclaration(clang::SourceLocation, clang::ParsedAttributes&) third_party/llvm/llvm/tools/clang/lib/Parse/ParseObjc.cpp:388:3</div><div> #10 0x2051fa9 in clang::Parser::ParseObjCAtDirectives() third_party/llvm/llvm/tools/clang/lib/Parse/ParseObjc.cpp:63:18</div><div> #11 0x1ff7871 in clang::Parser::ParseExternalDeclaration(clang::Parser::ParsedAttributesWithRange&, clang::ParsingDeclSpec*) third_party/llvm/llvm/tools/clang/lib/Parse/Parser.cpp:757:12</div><div> #12 0x1ff6c61 in clang::Parser::ParseTopLevelDecl(clang::OpaquePtr<clang::DeclGroupRef>&) third_party/llvm/llvm/tools/clang/lib/Parse/Parser.cpp:628:12</div><div> #13 0x1ff016d in clang::ParseAST(clang::Sema&, bool, bool) third_party/llvm/llvm/tools/clang/lib/Parse/ParseAST.cpp:147:18</div><div> #14 0x1ab05d3 in clang::FrontendAction::Execute() third_party/llvm/llvm/tools/clang/lib/Frontend/FrontendAction.cpp:458:8</div><div> #15 0x184fbd6 in clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) third_party/llvm/llvm/tools/clang/lib/Frontend/CompilerInstance.cpp:871:11</div><div> #16 0x5c6f47 in clang::ExecuteCompilerInvocation(clang::CompilerInstance*) third_party/llvm/llvm/tools/clang/lib/FrontendTool/ExecuteCompilerInvocation.cpp:249:25</div><div> #17 0x5a114d in cc1_main(llvm::ArrayRef<char const*>, char const*, void*) third_party/llvm/llvm/tools/clang/tools/driver/cc1_main.cpp:183:13</div><div> #18 0x5bb3f6 in ExecuteCC1Tool(llvm::ArrayRef<char const*>, llvm::StringRef) third_party/llvm/llvm/tools/clang/tools/driver/driver.cpp:299:12</div><div> #19 0x5ba314 in main third_party/llvm/llvm/tools/clang/tools/driver/driver.cpp:380:12</div><div><br></div><div>0x621000091288 is located 392 bytes inside of 4096-byte region [0x621000091100,0x621000092100)</div><div>allocated by thread T0 here:</div><div> #0 0x58a52c in __interceptor_malloc third_party/llvm/llvm/projects/compiler-rt/lib/asan/asan_malloc_linux.cc:64:3</div><div> #1 0x5a5d0b in llvm::MallocAllocator::Allocate(unsigned long, unsigned long) third_party/llvm/llvm/include/llvm/Support/Allocator.h:95:12</div><div> #2 0x691b67 in llvm::BumpPtrAllocatorImpl<llvm::MallocAllocator, 4096ul, 4096ul>::StartNewSlab() third_party/llvm/llvm/include/llvm/Support/Allocator.h:324:31</div><div> #3 0x6916aa in llvm::BumpPtrAllocatorImpl<llvm::MallocAllocator, 4096ul, 4096ul>::Allocate(unsigned long, unsigned long) third_party/llvm/llvm/include/llvm/Support/Allocator.h:249:5</div><div> #4 0x6913d1 in clang::ASTContext::Allocate(unsigned long, unsigned int) const third_party/llvm/llvm/tools/clang/include/clang/AST/ASTContext.h:588:22</div><div> #5 0x3010c16 in clang::ObjCInterfaceDecl::Create(clang::ASTContext const&, clang::DeclContext*, clang::SourceLocation, clang::IdentifierInfo*, clang::ObjCTypeParamList*, clang::ObjCInterfaceDecl*, clang::SourceLocation, bool) third_party/llvm/llvm/tools/clang/lib/AST/DeclObjC.cpp:1396:31</div><div> #6 0x2838c96 in clang::Sema::ActOnStartClassInterface(clang::Scope*, clang::SourceLocation, clang::IdentifierInfo*, clang::SourceLocation, clang::ObjCTypeParamList*, clang::IdentifierInfo*, clang::SourceLocation, llvm::ArrayRef<clang::OpaquePtr<clang::QualType> >, clang::SourceRange, clang::Decl* const*, unsigned int, clang::SourceLocation const*, clang::SourceLocation, clang::AttributeList*) third_party/llvm/llvm/tools/clang/lib/Sema/SemaDeclObjC.cpp:981:7</div><div> #7 0x2053112 in clang::Parser::ParseObjCAtInterfaceDeclaration(clang::SourceLocation, clang::ParsedAttributes&) third_party/llvm/llvm/tools/clang/lib/Parse/ParseObjc.cpp:375:13</div><div> #8 0x2051fa9 in clang::Parser::ParseObjCAtDirectives() third_party/llvm/llvm/tools/clang/lib/Parse/ParseObjc.cpp:63:18</div><div> #9 0x1ff7871 in clang::Parser::ParseExternalDeclaration(clang::Parser::ParsedAttributesWithRange&, clang::ParsingDeclSpec*) third_party/llvm/llvm/tools/clang/lib/Parse/Parser.cpp:757:12</div><div> #10 0x1ff6c61 in clang::Parser::ParseTopLevelDecl(clang::OpaquePtr<clang::DeclGroupRef>&) third_party/llvm/llvm/tools/clang/lib/Parse/Parser.cpp:628:12</div><div> #11 0x1ff016d in clang::ParseAST(clang::Sema&, bool, bool) third_party/llvm/llvm/tools/clang/lib/Parse/ParseAST.cpp:147:18</div><div> #12 0x1ab05d3 in clang::FrontendAction::Execute() third_party/llvm/llvm/tools/clang/lib/Frontend/FrontendAction.cpp:458:8</div><div> #13 0x184fbd6 in clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) third_party/llvm/llvm/tools/clang/lib/Frontend/CompilerInstance.cpp:871:11</div><div> #14 0x5c6f47 in clang::ExecuteCompilerInvocation(clang::CompilerInstance*) third_party/llvm/llvm/tools/clang/lib/FrontendTool/ExecuteCompilerInvocation.cpp:249:25</div><div> #15 0x5a114d in cc1_main(llvm::ArrayRef<char const*>, char const*, void*) third_party/llvm/llvm/tools/clang/tools/driver/cc1_main.cpp:183:13</div><div> #16 0x5bb3f6 in ExecuteCC1Tool(llvm::ArrayRef<char const*>, llvm::StringRef) third_party/llvm/llvm/tools/clang/tools/driver/driver.cpp:299:12</div><div> #17 0x5ba314 in main third_party/llvm/llvm/tools/clang/tools/driver/driver.cpp:380:12</div><div><br></div><div>SUMMARY: AddressSanitizer: use-after-poison third_party/llvm/llvm/tools/clang/include/clang/AST/TypeLoc.h:737:55 in clang::ObjCTypeParamTypeLoc::setProtocolRAngleLoc(clang::SourceLocation)</div><div>Shadow bytes around the buggy address:</div><div> 0x0c428000a200: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa</div><div> 0x0c428000a210: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa</div><div> 0x0c428000a220: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00</div><div> 0x0c428000a230: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00</div><div> 0x0c428000a240: 00 00 00 04 00 04 00 04 00 00 00 00 00 00 00 00</div><div>=>0x0c428000a250: 00[f7]f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7</div><div> 0x0c428000a260: f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7</div><div> 0x0c428000a270: f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7</div><div> 0x0c428000a280: f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7</div><div> 0x0c428000a290: f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7</div><div> 0x0c428000a2a0: f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7</div><div>Shadow byte legend (one shadow byte represents 8 application bytes):</div><div> Addressable: 00</div><div> Partially addressable: 01 02 03 04 05 06 07 </div><div> Heap left redzone: fa</div><div> Heap right redzone: fb</div><div> Freed heap region: fd</div><div> Stack left redzone: f1</div><div> Stack mid redzone: f2</div><div> Stack right redzone: f3</div><div> Stack partial redzone: f4</div><div> Stack after return: f5</div><div> Stack use after scope: f8</div><div> Global redzone: f9</div><div> Global init order: f6</div><div> Poisoned by user: f7</div><div> Container overflow: fc</div><div> Array cookie: ac</div><div> Intra object redzone: bb</div><div> ASan internal: fe</div><div> Left alloca redzone: ca</div><div> Right alloca redzone: cb</div></div></div><div class="gmail_extra"><br><div class="gmail_quote">On Tue, Sep 13, 2016 at 9:45 AM, Manman Ren via cfe-commits <span dir="ltr"><<a href="mailto:cfe-commits@lists.llvm.org" target="_blank">cfe-commits@lists.llvm.org</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Author: mren<br>
Date: Tue Sep 13 11:45:29 2016<br>
New Revision: 281351<br>
<br>
URL: <a href="http://llvm.org/viewvc/llvm-project?rev=281351&view=rev" rel="noreferrer" target="_blank">http://llvm.org/viewvc/llvm-<wbr>project?rev=281351&view=rev</a><br>
Log:<br>
Add a class ObjCProtocolQualifiers to wrap APIs for ObjC protocol list.<br>
<br>
Now ObjCObjectType extends from ObjCProtocolQualifiers. We save number of<br>
protocols in ObjCProtocolQualifiers.<br>
<br>
This is in preparation of adding a new type class ObjCTypeParamType that<br>
can take protocol qualifiers.<br>
<br>
rdar://24619481<br>
rdar://25060179<br>
<br>
Differential Revision: <a href="http://reviews.llvm.org/D23078" rel="noreferrer" target="_blank">http://reviews.llvm.org/D23078</a><br>
<br>
Modified:<br>
cfe/trunk/include/clang/AST/<wbr>Type.h<br>
cfe/trunk/lib/AST/Type.cpp<br>
<br>
Modified: cfe/trunk/include/clang/AST/<wbr>Type.h<br>
URL: <a href="http://llvm.org/viewvc/llvm-project/cfe/trunk/include/clang/AST/Type.h?rev=281351&r1=281350&r2=281351&view=diff" rel="noreferrer" target="_blank">http://llvm.org/viewvc/llvm-<wbr>project/cfe/trunk/include/<wbr>clang/AST/Type.h?rev=281351&<wbr>r1=281350&r2=281351&view=diff</a><br>
==============================<wbr>==============================<wbr>==================<br>
--- cfe/trunk/include/clang/AST/<wbr>Type.h (original)<br>
+++ cfe/trunk/include/clang/AST/<wbr>Type.h Tue Sep 13 11:45:29 2016<br>
@@ -4699,6 +4699,59 @@ public:<br>
}<br>
};<br>
<br>
+/// This class wraps the list of protocol qualifiers. For types that can<br>
+/// take ObjC protocol qualifers, they can subclass this class.<br>
+template <class T><br>
+class ObjCProtocolQualifiers {<br>
+protected:<br>
+ ObjCProtocolQualifiers() {}<br>
+ ObjCProtocolDecl * const *getProtocolStorage() const {<br>
+ return const_cast<<wbr>ObjCProtocolQualifiers*>(this)<wbr>->getProtocolStorage();<br>
+ }<br>
+<br>
+ ObjCProtocolDecl **getProtocolStorage() {<br>
+ return static_cast<T*>(this)-><wbr>getProtocolStorageImpl();<br>
+ }<br>
+ void setNumProtocols(unsigned N) {<br>
+ static_cast<T*>(this)-><wbr>setNumProtocolsImpl(N);<br>
+ }<br>
+ void initialize(ArrayRef<<wbr>ObjCProtocolDecl *> protocols) {<br>
+ setNumProtocols(protocols.<wbr>size());<br>
+ assert(getNumProtocols() == protocols.size() &&<br>
+ "bitfield overflow in protocol count");<br>
+ if (!protocols.empty())<br>
+ memcpy(getProtocolStorage(), protocols.data(),<br>
+ protocols.size() * sizeof(ObjCProtocolDecl*));<br>
+ }<br>
+<br>
+public:<br>
+ typedef ObjCProtocolDecl * const *qual_iterator;<br>
+ typedef llvm::iterator_range<qual_<wbr>iterator> qual_range;<br>
+<br>
+ qual_range quals() const { return qual_range(qual_begin(), qual_end()); }<br>
+ qual_iterator qual_begin() const { return getProtocolStorage(); }<br>
+ qual_iterator qual_end() const { return qual_begin() + getNumProtocols(); }<br>
+<br>
+ bool qual_empty() const { return getNumProtocols() == 0; }<br>
+<br>
+ /// Return the number of qualifying protocols in this type, or 0 if<br>
+ /// there are none.<br>
+ unsigned getNumProtocols() const {<br>
+ return static_cast<const T*>(this)-><wbr>getNumProtocolsImpl();<br>
+ }<br>
+<br>
+ /// Fetch a protocol by index.<br>
+ ObjCProtocolDecl *getProtocol(unsigned I) const {<br>
+ assert(I < getNumProtocols() && "Out-of-range protocol access");<br>
+ return qual_begin()[I];<br>
+ }<br>
+<br>
+ /// Retrieve all of the protocol qualifiers.<br>
+ ArrayRef<ObjCProtocolDecl *> getProtocols() const {<br>
+ return ArrayRef<ObjCProtocolDecl *>(qual_begin(), getNumProtocols());<br>
+ }<br>
+};<br>
+<br>
/// Represents a class type in Objective C.<br>
///<br>
/// Every Objective C type is a combination of a base type, a set of<br>
@@ -4727,7 +4780,9 @@ public:<br>
/// 'id<P>' is an ObjCObjectPointerType whose pointee is an ObjCObjectType<br>
/// with base BuiltinType::ObjCIdType and protocol list [P]. Eventually<br>
/// this should get its own sugar class to better represent the source.<br>
-class ObjCObjectType : public Type {<br>
+class ObjCObjectType : public Type,<br>
+ public ObjCProtocolQualifiers<<wbr>ObjCObjectType> {<br>
+ friend class ObjCProtocolQualifiers<<wbr>ObjCObjectType>;<br>
// ObjCObjectType.NumTypeArgs - the number of type arguments stored<br>
// after the ObjCObjectPointerType node.<br>
// ObjCObjectType.NumProtocols - the number of protocols stored<br>
@@ -4747,16 +4802,20 @@ class ObjCObjectType : public Type {<br>
mutable llvm::PointerIntPair<const ObjCObjectType *, 1, bool><br>
CachedSuperClassType;<br>
<br>
- ObjCProtocolDecl * const *getProtocolStorage() const {<br>
- return const_cast<ObjCObjectType*>(<wbr>this)->getProtocolStorage();<br>
- }<br>
-<br>
QualType *getTypeArgStorage();<br>
const QualType *getTypeArgStorage() const {<br>
return const_cast<ObjCObjectType *>(this)->getTypeArgStorage();<br>
}<br>
<br>
- ObjCProtocolDecl **getProtocolStorage();<br>
+ ObjCProtocolDecl **getProtocolStorageImpl();<br>
+ /// Return the number of qualifying protocols in this interface type,<br>
+ /// or 0 if there are none.<br>
+ unsigned getNumProtocolsImpl() const {<br>
+ return ObjCObjectTypeBits.<wbr>NumProtocols;<br>
+ }<br>
+ void setNumProtocolsImpl(unsigned N) {<br>
+ ObjCObjectTypeBits.<wbr>NumProtocols = N;<br>
+ }<br>
<br>
protected:<br>
ObjCObjectType(QualType Canonical, QualType Base,<br>
@@ -4833,30 +4892,6 @@ public:<br>
ObjCObjectTypeBits.<wbr>NumTypeArgs);<br>
}<br>
<br>
- typedef ObjCProtocolDecl * const *qual_iterator;<br>
- typedef llvm::iterator_range<qual_<wbr>iterator> qual_range;<br>
-<br>
- qual_range quals() const { return qual_range(qual_begin(), qual_end()); }<br>
- qual_iterator qual_begin() const { return getProtocolStorage(); }<br>
- qual_iterator qual_end() const { return qual_begin() + getNumProtocols(); }<br>
-<br>
- bool qual_empty() const { return getNumProtocols() == 0; }<br>
-<br>
- /// Return the number of qualifying protocols in this interface type,<br>
- /// or 0 if there are none.<br>
- unsigned getNumProtocols() const { return ObjCObjectTypeBits.<wbr>NumProtocols; }<br>
-<br>
- /// Fetch a protocol by index.<br>
- ObjCProtocolDecl *getProtocol(unsigned I) const {<br>
- assert(I < getNumProtocols() && "Out-of-range protocol access");<br>
- return qual_begin()[I];<br>
- }<br>
-<br>
- /// Retrieve all of the protocol qualifiers.<br>
- ArrayRef<ObjCProtocolDecl *> getProtocols() const {<br>
- return ArrayRef<ObjCProtocolDecl *>(qual_begin(), getNumProtocols());<br>
- }<br>
-<br>
/// Whether this is a "__kindof" type as written.<br>
bool isKindOfTypeAsWritten() const { return ObjCObjectTypeBits.IsKindOf; }<br>
<br>
@@ -4919,7 +4954,7 @@ inline QualType *ObjCObjectType::getType<br>
return reinterpret_cast<QualType *>(static_cast<<wbr>ObjCObjectTypeImpl*>(this)+1);<br>
}<br>
<br>
-inline ObjCProtocolDecl **ObjCObjectType::<wbr>getProtocolStorage() {<br>
+inline ObjCProtocolDecl **ObjCObjectType::<wbr>getProtocolStorageImpl() {<br>
return reinterpret_cast<<wbr>ObjCProtocolDecl**>(<br>
getTypeArgStorage() + ObjCObjectTypeBits.<wbr>NumTypeArgs);<br>
}<br>
<br>
Modified: cfe/trunk/lib/AST/Type.cpp<br>
URL: <a href="http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/AST/Type.cpp?rev=281351&r1=281350&r2=281351&view=diff" rel="noreferrer" target="_blank">http://llvm.org/viewvc/llvm-<wbr>project/cfe/trunk/lib/AST/<wbr>Type.cpp?rev=281351&r1=281350&<wbr>r2=281351&view=diff</a><br>
==============================<wbr>==============================<wbr>==================<br>
--- cfe/trunk/lib/AST/Type.cpp (original)<br>
+++ cfe/trunk/lib/AST/Type.cpp Tue Sep 13 11:45:29 2016<br>
@@ -546,15 +546,9 @@ ObjCObjectType::<wbr>ObjCObjectType(QualType<br>
ObjCObjectTypeBits.NumTypeArgs = typeArgs.size();<br>
assert(getTypeArgsAsWritten().<wbr>size() == typeArgs.size() &&<br>
"bitfield overflow in type argument count");<br>
- ObjCObjectTypeBits.<wbr>NumProtocols = protocols.size();<br>
- assert(getNumProtocols() == protocols.size() &&<br>
- "bitfield overflow in protocol count");<br>
if (!typeArgs.empty())<br>
memcpy(getTypeArgStorage(), typeArgs.data(),<br>
typeArgs.size() * sizeof(QualType));<br>
- if (!protocols.empty())<br>
- memcpy(getProtocolStorage(), protocols.data(),<br>
- protocols.size() * sizeof(ObjCProtocolDecl*));<br>
<br>
for (auto typeArg : typeArgs) {<br>
if (typeArg->isDependentType())<br>
@@ -565,6 +559,9 @@ ObjCObjectType::<wbr>ObjCObjectType(QualType<br>
if (typeArg-><wbr>containsUnexpandedParameterPac<wbr>k())<br>
setContainsUnexpandedParameter<wbr>Pack();<br>
}<br>
+ // Initialize the protocol qualifiers. The protocol storage is known<br>
+ // after we set number of type arguments.<br>
+ initialize(protocols);<br>
}<br>
<br>
bool ObjCObjectType::isSpecialized(<wbr>) const {<br>
<br>
<br>
______________________________<wbr>_________________<br>
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</blockquote></div><br><br clear="all"><div><br></div>-- <br><div class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr">--Artem Belevich</div></div>
</div>