LeakSanitizer detected memory leaks in llvm::SmallVectorBase<unsigned int>::grow_pod(void*, unsigned long, unsigned long) /home/ubuntu/llvm-project/llvm/lib/Support/SmallVector.cpp:151:15

[vrukesh]

LeakSanitizer: detected memory leaks .
Vulnerability location: malloc (/home/vrukesh/LLVM-embedded-toolchain-for-Arm/build_sanitizer/llvm/bin/clang-20+0x105632ae)

Steps to reproduce:

1. Download the source code git clone https://github.com/ARM-software/LLVM-embedded-toolchain-for-Arm.git
2. Give commands:

cd LLVM-embedded-toolchain-for-Arm
mkdir build_sanitizer;
cd build_sanitizer;
export CCACHE_DISABLE=1
cmake .. -GNinja -DFETCHCONTENT_QUIET=OFF -DCMAKE_BUILD_TYPE=Release -DLLVM_USE_SANITIZER="Address;Undefined" -DLLVM_ENABLE_ASSERTIONS=ON -DCMAKE_C_COMPILER=clang -DCMAKE_CXX_COMPILER=clang++
ninja llvm-toolchain
ninja check-llvm-toolchain
ninja check-cxx

Expected behavior
We do not observe any memory leaks.

Observed result
We observe memory leaks. Complete snippet is:

`================================================================
==4061127==ERROR: LeakSanitizer: detected memory leaks

Direct leak of 2808 byte(s) in 13 object(s) allocated from:
#0 0x55b9889852ae in malloc (/home/vrukesh/LLVM-embedded-toolchain-for-Arm/build_sanitizer/llvm/bin/clang-20+0x105632ae) (BuildId: a3166faab09d81d8)
#1 0x55b98c3b00e3 in safe_malloc /home/vrukesh/LLVM-embedded-toolchain-for-Arm/build_sanitizer/_deps/llvmproject-src/llvm/include/llvm/Support/MemAlloc.h:26:18
#2 0x55b98c3b00e3 in llvm::SmallVectorBase::grow_pod(void*, unsigned long, unsigned long) /home/vrukesh/LLVM-embedded-toolchain-for-Arm/build_sanitizer/_deps/llvmproject-src/llvm/lib/Support/SmallVector.cpp:143:15
#3 0x55b993a2e90c in grow_pod /home/vrukesh/LLVM-embedded-toolchain-for-Arm/build_sanitizer/_deps/llvmproject-src/llvm/include/llvm/ADT/SmallVector.h:151:11
#4 0x55b993a2e90c in grow /home/vrukesh/LLVM-embedded-toolchain-for-Arm/build_sanitizer/_deps/llvmproject-src/llvm/include/llvm/ADT/SmallVector.h:538:41
#5 0x55b993a2e90c in llvm::SmallVectorImplclang::TemplateArgument::operator=(llvm::SmallVectorImplclang::TemplateArgument const&) /home/vrukesh/LLVM-embedded-toolchain-for-Arm/build_sanitizer/_deps/llvmproject-src/llvm/include/llvm/ADT/SmallVector.h:1049:11
#6 0x55b993a11c5e in operator= /home/vrukesh/LLVM-embedded-toolchain-for-Arm/build_sanitizer/_deps/llvmproject-src/llvm/include/llvm/ADT/SmallVector.h:1255:25
#7 0x55b993a11c5e in clang::ConstraintSatisfaction::operator=(clang::ConstraintSatisfaction const&) /home/vrukesh/LLVM-embedded-toolchain-for-Arm/build_sanitizer/_deps/llvmproject-src/clang/include/clang/AST/ASTConcept.h:35:7
#8 0x55b994e9b798 in clang::MakeDeductionFailureInfo(clang::ASTContext&, clang::TemplateDeductionResult, clang::sema::TemplateDeductionInfo&) /home/vrukesh/LLVM-embedded-toolchain-for-Arm/build_sanitizer/_deps/llvmproject-src/clang/lib/Sema/SemaOverload.cpp:777:25
#9 0x55b994ed3fa9 in clang::Sema::AddMethodTemplateCandidate(clang::FunctionTemplateDecl*, clang::DeclAccessPair, clang::CXXRecordDecl*, clang::TemplateArgumentListInfo*, clang::QualType, clang::Expr::Classification, llvm::ArrayRefclang::Expr*, clang::OverloadCandidateSet&, bool, bool, clang::OverloadCandidateParamOrder) /home/vrukesh/LLVM-embedded-toolchain-for-Arm/build_sanitizer/_deps/llvmproject-src/clang/lib/Sema/SemaOverload.cpp:7621:36
#10 0x55b994ed5818 in clang::Sema::AddMethodCandidate(clang::DeclAccessPair, clang::QualType, clang::Expr::Classification, llvm::ArrayRefclang::Expr*, clang::OverloadCandidateSet&, bool, clang::OverloadCandidateParamOrder) /home/vrukesh/LLVM-embedded-toolchain-for-Arm/build_sanitizer/_deps/llvmproject-src/clang/lib/Sema/SemaOverload.cpp:7375:5
#11 0x55b994f26ffb in clang::Sema::BuildCallToObjectOfClassType(clang::Scope*, clang::Expr*, clang::SourceLocation, llvm::MutableArrayRefclang::Expr*, clang::SourceLocation) /home/vrukesh/LLVM-embedded-toolchain-for-Arm/build_sanitizer/_deps/llvmproject-src/clang/lib/Sema/SemaOverload.cpp:15584:5
#12 0x55b99421b195 in clang::Sema::BuildCallExpr(clang::Scope*, clang::Expr*, clang::SourceLocation, llvm::MutableArrayRefclang::Expr*, clang::SourceLocation, clang::Expr*, bool, bool) /home/vrukesh/LLVM-embedded-toolchain-for-Arm/build_sanitizer/_deps/llvmproject-src/clang/lib/Sema/SemaExpr.cpp:6447:14
#13 0x55b99425cb8a in clang::Sema::ActOnCallExpr(clang::Scope*, clang::Expr*, clang::SourceLocation, llvm::MutableArrayRefclang::Expr*, clang::SourceLocation, clang::Expr*) /home/vrukesh/LLVM-embedded-toolchain-for-Arm/build_sanitizer/_deps/llvmproject-src/clang/lib/Sema/SemaExpr.cpp:6360:7
#14 0x55b993301764 in clang::Parser::ParsePostfixExpressionSuffix(clang::ActionResult<clang::Expr*, true>) /home/vrukesh/LLVM-embedded-toolchain-for-Arm/build_sanitizer/_deps/llvmproject-src/clang/lib/Parse/ParseExpr.cpp:2243:23
#15 0x55b99330813d in clang::Parser::ParseCastExpression(clang::Parser::CastParseKind, bool, bool&, clang::Parser::TypeCastState, bool, bool*) /home/vrukesh/LLVM-embedded-toolchain-for-Arm/build_sanitizer/_deps/llvmproject-src/clang/lib/Parse/ParseExpr.cpp:1945:9
#16 0x55b993308558 in clang::Parser::ParseCastExpression(clang::Parser::CastParseKind, bool, bool&, clang::Parser::TypeCastState, bool, bool*) /home/vrukesh/LLVM-embedded-toolchain-for-Arm/build_sanitizer/_deps/llvmproject-src/clang/lib/Parse/ParseExpr.cpp:1232:18
#17 0x55b9932ff216 in clang::Parser::ParseCastExpression(clang::Parser::CastParseKind, bool, clang::Parser::TypeCastState, bool, bool*) /home/vrukesh/LLVM-embedded-toolchain-for-Arm/build_sanitizer/_deps/llvmproject-src/clang/lib/Parse/ParseExpr.cpp:712:20
#18 0x55b993314424 in clang::Parser::ParseParenExpression(clang::Parser::ParenParseOption&, bool, bool, clang::OpaquePtrclang::QualType&, clang::SourceLocation&) /home/vrukesh/LLVM-embedded-toolchain-for-Arm/build_sanitizer/_deps/llvmproject-src/clang/lib/Parse/ParseExpr.cpp:3265:18
#19 0x55b99330aa78 in clang::Parser::ParseCastExpression(clang::Parser::CastParseKind, bool, bool&, clang::Parser::TypeCastState, bool, bool*) /home/vrukesh/LLVM-embedded-toolchain-for-Arm/build_sanitizer/_deps/llvmproject-src/clang/lib/Parse/ParseExpr.cpp:1093:11
#20 0x55b9932ff216 in clang::Parser::ParseCastExpression(clang::Parser::CastParseKind, bool, clang::Parser::TypeCastState, bool, bool*) /home/vrukesh/LLVM-embedded-toolchain-for-Arm/build_sanitizer/_deps/llvmproject-src/clang/lib/Parse/ParseExpr.cpp:712:20
#21 0x55b9932fb8a1 in clang::Parser::ParseAssignmentExpression(clang::Parser::TypeCastState) /home/vrukesh/LLVM-embedded-toolchain-for-Arm/build_sanitizer/_deps/llvmproject-src/clang/lib/Parse/ParseExpr.cpp:182:20
#22 0x55b9932fb722 in clang::Parser::ParseExpression(clang::Parser::TypeCastState) /home/vrukesh/LLVM-embedded-toolchain-for-Arm/build_sanitizer/_deps/llvmproject-src/clang/lib/Parse/ParseExpr.cpp:133:18
#23 0x55b99344d64c in clang::Parser::ParseExprStatement(clang::Parser::ParsedStmtContext) /home/vrukesh/LLVM-embedded-toolchain-for-Arm/build_sanitizer/_deps/llvmproject-src/clang/lib/Parse/ParseStmt.cpp:563:19
#24 0x55b9934497ef in clang::Parser::ParseStatementOrDeclarationAfterAttributes(llvm::SmallVector<clang::Stmt*, 32u>&, clang::Parser::ParsedStmtContext, clang::SourceLocation*, clang::ParsedAttributes&, clang::ParsedAttributes&) /home/vrukesh/LLVM-embedded-toolchain-for-Arm/build_sanitizer/_deps/llvmproject-src/clang/lib/Parse/ParseStmt.cpp:292:14
#25 0x55b9934487ab in clang::Parser::ParseStatementOrDeclaration(llvm::SmallVector<clang::Stmt*, 32u>&, clang::Parser::ParsedStmtContext, clang::SourceLocation*) /home/vrukesh/LLVM-embedded-toolchain-for-Arm/build_sanitizer/_deps/llvmproject-src/clang/lib/Parse/ParseStmt.cpp:124:20
#26 0x55b99345d5e1 in clang::Parser::ParseCompoundStatementBody(bool) /home/vrukesh/LLVM-embedded-toolchain-for-Arm/build_sanitizer/_deps/llvmproject-src/clang/lib/Parse/ParseStmt.cpp:1257:11
#27 0x55b993460f7a in clang::Parser::ParseFunctionStatementBody(clang::Decl*, clang::Parser::ParseScope&) /home/vrukesh/LLVM-embedded-toolchain-for-Arm/build_sanitizer/_deps/llvmproject-src/clang/lib/Parse/ParseStmt.cpp:2535:21
#28 0x55b9932a99ef in clang::Parser::ParseFunctionDefinition(clang::ParsingDeclarator&, clang::Parser::ParsedTemplateInfo const&, clang::Parser::LateParsedAttrList*) /home/vrukesh/LLVM-embedded-toolchain-for-Arm/build_sanitizer/_deps/llvmproject-src/clang/lib/Parse/Parser.cpp:1525:10
#29 0x55b9933b6364 in clang::Parser::ParseDeclGroup(clang::ParsingDeclSpec&, clang::DeclaratorContext, clang::ParsedAttributes&, clang::Parser::ParsedTemplateInfo&, clang::SourceLocation*, clang::Parser::ForRangeInit*) /home/vrukesh/LLVM-embedded-toolchain-for-Arm/build_sanitizer/_deps/llvmproject-src/clang/lib/Parse/ParseDecl.cpp:2471:17
#30 0x55b9932a6bc6 in clang::Parser::ParseDeclOrFunctionDefInternal(clang::ParsedAttributes&, clang::ParsedAttributes&, clang::ParsingDeclSpec&, clang::AccessSpecifier) /home/vrukesh/LLVM-embedded-toolchain-for-Arm/build_sanitizer/_deps/llvmproject-src/clang/lib/Parse/Parser.cpp:1249:10
#31 0x55b9932a597d in clang::Parser::ParseDeclarationOrFunctionDefinition(clang::ParsedAttributes&, clang::ParsedAttributes&, clang::ParsingDeclSpec*, clang::AccessSpecifier) /home/vrukesh/LLVM-embedded-toolchain-for-Arm/build_sanitizer/_deps/llvmproject-src/clang/lib/Parse/Parser.cpp:1271:12
#32 0x55b9932a31d0 in clang::Parser::ParseExternalDeclaration(clang::ParsedAttributes&, clang::ParsedAttributes&, clang::ParsingDeclSpec*) /home/vrukesh/LLVM-embedded-toolchain-for-Arm/build_sanitizer/_deps/llvmproject-src/clang/lib/Parse/Parser.cpp:1074:14
#33 0x55b99329edcf in clang::Parser::ParseTopLevelDecl(clang::OpaquePtrclang::DeclGroupRef&, clang::Sema::ModuleImportState&) /home/vrukesh/LLVM-embedded-toolchain-for-Arm/build_sanitizer/_deps/llvmproject-src/clang/lib/Parse/Parser.cpp:763:12

SUMMARY: AddressSanitizer: 2808 byte(s) leaked in 13 allocation(s).
error: command failed with exit status: 1`

[llvmbot]

@llvm/issue-subscribers-clang-frontend

Author: Vrukesh Panse (vrukesh)

LeakSanitizer: detected memory leaks . Vulnerability location: malloc (/home/vrukesh/LLVM-embedded-toolchain-for-Arm/build_sanitizer/llvm/bin/clang-20+0x105632ae)

Steps to reproduce:

1. Download the source code git clone https://github.com/ARM-software/LLVM-embedded-toolchain-for-Arm.git
2. Give commands:

cd LLVM-embedded-toolchain-for-Arm
mkdir build_sanitizer;
cd build_sanitizer;
export CCACHE_DISABLE=1
cmake .. -GNinja -DFETCHCONTENT_QUIET=OFF -DCMAKE_BUILD_TYPE=Release -DLLVM_USE_SANITIZER="Address;Undefined" -DLLVM_ENABLE_ASSERTIONS=ON -DCMAKE_C_COMPILER=clang -DCMAKE_CXX_COMPILER=clang++
ninja llvm-toolchain
ninja check-llvm-toolchain
ninja check-cxx

Expected behavior
We do not observe any memory leaks.

Observed result
We observe memory leaks. Complete snippet is:

`================================================================
==4061127==ERROR: LeakSanitizer: detected memory leaks

Direct leak of 2808 byte(s) in 13 object(s) allocated from:
#0 0x55b9889852ae in malloc (/home/vrukesh/LLVM-embedded-toolchain-for-Arm/build_sanitizer/llvm/bin/clang-20+0x105632ae) (BuildId: a3166faab09d81d8)
#1 0x55b98c3b00e3 in safe_malloc /home/vrukesh/LLVM-embedded-toolchain-for-Arm/build_sanitizer/_deps/llvmproject-src/llvm/include/llvm/Support/MemAlloc.h:26:18
#2 0x55b98c3b00e3 in llvm::SmallVectorBase<unsigned int>::grow_pod(void*, unsigned long, unsigned long) /home/vrukesh/LLVM-embedded-toolchain-for-Arm/build_sanitizer/_deps/llvmproject-src/llvm/lib/Support/SmallVector.cpp:143:15
#3 0x55b993a2e90c in grow_pod /home/vrukesh/LLVM-embedded-toolchain-for-Arm/build_sanitizer/_deps/llvmproject-src/llvm/include/llvm/ADT/SmallVector.h:151:11
#4 0x55b993a2e90c in grow /home/vrukesh/LLVM-embedded-toolchain-for-Arm/build_sanitizer/_deps/llvmproject-src/llvm/include/llvm/ADT/SmallVector.h:538:41
#5 0x55b993a2e90c in llvm::SmallVectorImpl<clang::TemplateArgument>::operator=(llvm::SmallVectorImpl<clang::TemplateArgument> const&) /home/vrukesh/LLVM-embedded-toolchain-for-Arm/build_sanitizer/_deps/llvmproject-src/llvm/include/llvm/ADT/SmallVector.h:1049:11
#6 0x55b993a11c5e in operator= /home/vrukesh/LLVM-embedded-toolchain-for-Arm/build_sanitizer/_deps/llvmproject-src/llvm/include/llvm/ADT/SmallVector.h:1255:25
#7 0x55b993a11c5e in clang::ConstraintSatisfaction::operator=(clang::ConstraintSatisfaction const&) /home/vrukesh/LLVM-embedded-toolchain-for-Arm/build_sanitizer/_deps/llvmproject-src/clang/include/clang/AST/ASTConcept.h:35:7
#8 0x55b994e9b798 in clang::MakeDeductionFailureInfo(clang::ASTContext&, clang::TemplateDeductionResult, clang::sema::TemplateDeductionInfo&) /home/vrukesh/LLVM-embedded-toolchain-for-Arm/build_sanitizer/_deps/llvmproject-src/clang/lib/Sema/SemaOverload.cpp:777:25
#9 0x55b994ed3fa9 in clang::Sema::AddMethodTemplateCandidate(clang::FunctionTemplateDecl*, clang::DeclAccessPair, clang::CXXRecordDecl*, clang::TemplateArgumentListInfo*, clang::QualType, clang::Expr::Classification, llvm::ArrayRef<clang::Expr*>, clang::OverloadCandidateSet&, bool, bool, clang::OverloadCandidateParamOrder) /home/vrukesh/LLVM-embedded-toolchain-for-Arm/build_sanitizer/_deps/llvmproject-src/clang/lib/Sema/SemaOverload.cpp:7621:36
#10 0x55b994ed5818 in clang::Sema::AddMethodCandidate(clang::DeclAccessPair, clang::QualType, clang::Expr::Classification, llvm::ArrayRef<clang::Expr*>, clang::OverloadCandidateSet&, bool, clang::OverloadCandidateParamOrder) /home/vrukesh/LLVM-embedded-toolchain-for-Arm/build_sanitizer/_deps/llvmproject-src/clang/lib/Sema/SemaOverload.cpp:7375:5
#11 0x55b994f26ffb in clang::Sema::BuildCallToObjectOfClassType(clang::Scope*, clang::Expr*, clang::SourceLocation, llvm::MutableArrayRef<clang::Expr*>, clang::SourceLocation) /home/vrukesh/LLVM-embedded-toolchain-for-Arm/build_sanitizer/_deps/llvmproject-src/clang/lib/Sema/SemaOverload.cpp:15584:5
#12 0x55b99421b195 in clang::Sema::BuildCallExpr(clang::Scope*, clang::Expr*, clang::SourceLocation, llvm::MutableArrayRef<clang::Expr*>, clang::SourceLocation, clang::Expr*, bool, bool) /home/vrukesh/LLVM-embedded-toolchain-for-Arm/build_sanitizer/_deps/llvmproject-src/clang/lib/Sema/SemaExpr.cpp:6447:14
#13 0x55b99425cb8a in clang::Sema::ActOnCallExpr(clang::Scope*, clang::Expr*, clang::SourceLocation, llvm::MutableArrayRef<clang::Expr*>, clang::SourceLocation, clang::Expr*) /home/vrukesh/LLVM-embedded-toolchain-for-Arm/build_sanitizer/_deps/llvmproject-src/clang/lib/Sema/SemaExpr.cpp:6360:7
#14 0x55b993301764 in clang::Parser::ParsePostfixExpressionSuffix(clang::ActionResult<clang::Expr*, true>) /home/vrukesh/LLVM-embedded-toolchain-for-Arm/build_sanitizer/_deps/llvmproject-src/clang/lib/Parse/ParseExpr.cpp:2243:23
#15 0x55b99330813d in clang::Parser::ParseCastExpression(clang::Parser::CastParseKind, bool, bool&, clang::Parser::TypeCastState, bool, bool*) /home/vrukesh/LLVM-embedded-toolchain-for-Arm/build_sanitizer/_deps/llvmproject-src/clang/lib/Parse/ParseExpr.cpp:1945:9
#16 0x55b993308558 in clang::Parser::ParseCastExpression(clang::Parser::CastParseKind, bool, bool&, clang::Parser::TypeCastState, bool, bool*) /home/vrukesh/LLVM-embedded-toolchain-for-Arm/build_sanitizer/_deps/llvmproject-src/clang/lib/Parse/ParseExpr.cpp:1232:18
#17 0x55b9932ff216 in clang::Parser::ParseCastExpression(clang::Parser::CastParseKind, bool, clang::Parser::TypeCastState, bool, bool*) /home/vrukesh/LLVM-embedded-toolchain-for-Arm/build_sanitizer/_deps/llvmproject-src/clang/lib/Parse/ParseExpr.cpp:712:20
#18 0x55b993314424 in clang::Parser::ParseParenExpression(clang::Parser::ParenParseOption&, bool, bool, clang::OpaquePtr<clang::QualType>&, clang::SourceLocation&) /home/vrukesh/LLVM-embedded-toolchain-for-Arm/build_sanitizer/_deps/llvmproject-src/clang/lib/Parse/ParseExpr.cpp:3265:18
#19 0x55b99330aa78 in clang::Parser::ParseCastExpression(clang::Parser::CastParseKind, bool, bool&, clang::Parser::TypeCastState, bool, bool*) /home/vrukesh/LLVM-embedded-toolchain-for-Arm/build_sanitizer/_deps/llvmproject-src/clang/lib/Parse/ParseExpr.cpp:1093:11
#20 0x55b9932ff216 in clang::Parser::ParseCastExpression(clang::Parser::CastParseKind, bool, clang::Parser::TypeCastState, bool, bool*) /home/vrukesh/LLVM-embedded-toolchain-for-Arm/build_sanitizer/_deps/llvmproject-src/clang/lib/Parse/ParseExpr.cpp:712:20
#21 0x55b9932fb8a1 in clang::Parser::ParseAssignmentExpression(clang::Parser::TypeCastState) /home/vrukesh/LLVM-embedded-toolchain-for-Arm/build_sanitizer/_deps/llvmproject-src/clang/lib/Parse/ParseExpr.cpp:182:20
#22 0x55b9932fb722 in clang::Parser::ParseExpression(clang::Parser::TypeCastState) /home/vrukesh/LLVM-embedded-toolchain-for-Arm/build_sanitizer/_deps/llvmproject-src/clang/lib/Parse/ParseExpr.cpp:133:18
#23 0x55b99344d64c in clang::Parser::ParseExprStatement(clang::Parser::ParsedStmtContext) /home/vrukesh/LLVM-embedded-toolchain-for-Arm/build_sanitizer/_deps/llvmproject-src/clang/lib/Parse/ParseStmt.cpp:563:19
#24 0x55b9934497ef in clang::Parser::ParseStatementOrDeclarationAfterAttributes(llvm::SmallVector<clang::Stmt*, 32u>&, clang::Parser::ParsedStmtContext, clang::SourceLocation*, clang::ParsedAttributes&, clang::ParsedAttributes&) /home/vrukesh/LLVM-embedded-toolchain-for-Arm/build_sanitizer/_deps/llvmproject-src/clang/lib/Parse/ParseStmt.cpp:292:14
#25 0x55b9934487ab in clang::Parser::ParseStatementOrDeclaration(llvm::SmallVector<clang::Stmt*, 32u>&, clang::Parser::ParsedStmtContext, clang::SourceLocation*) /home/vrukesh/LLVM-embedded-toolchain-for-Arm/build_sanitizer/_deps/llvmproject-src/clang/lib/Parse/ParseStmt.cpp:124:20
#26 0x55b99345d5e1 in clang::Parser::ParseCompoundStatementBody(bool) /home/vrukesh/LLVM-embedded-toolchain-for-Arm/build_sanitizer/_deps/llvmproject-src/clang/lib/Parse/ParseStmt.cpp:1257:11
#27 0x55b993460f7a in clang::Parser::ParseFunctionStatementBody(clang::Decl*, clang::Parser::ParseScope&) /home/vrukesh/LLVM-embedded-toolchain-for-Arm/build_sanitizer/_deps/llvmproject-src/clang/lib/Parse/ParseStmt.cpp:2535:21
#28 0x55b9932a99ef in clang::Parser::ParseFunctionDefinition(clang::ParsingDeclarator&, clang::Parser::ParsedTemplateInfo const&, clang::Parser::LateParsedAttrList*) /home/vrukesh/LLVM-embedded-toolchain-for-Arm/build_sanitizer/_deps/llvmproject-src/clang/lib/Parse/Parser.cpp:1525:10
#29 0x55b9933b6364 in clang::Parser::ParseDeclGroup(clang::ParsingDeclSpec&, clang::DeclaratorContext, clang::ParsedAttributes&, clang::Parser::ParsedTemplateInfo&, clang::SourceLocation*, clang::Parser::ForRangeInit*) /home/vrukesh/LLVM-embedded-toolchain-for-Arm/build_sanitizer/_deps/llvmproject-src/clang/lib/Parse/ParseDecl.cpp:2471:17
#30 0x55b9932a6bc6 in clang::Parser::ParseDeclOrFunctionDefInternal(clang::ParsedAttributes&, clang::ParsedAttributes&, clang::ParsingDeclSpec&, clang::AccessSpecifier) /home/vrukesh/LLVM-embedded-toolchain-for-Arm/build_sanitizer/_deps/llvmproject-src/clang/lib/Parse/Parser.cpp:1249:10
#31 0x55b9932a597d in clang::Parser::ParseDeclarationOrFunctionDefinition(clang::ParsedAttributes&, clang::ParsedAttributes&, clang::ParsingDeclSpec*, clang::AccessSpecifier) /home/vrukesh/LLVM-embedded-toolchain-for-Arm/build_sanitizer/_deps/llvmproject-src/clang/lib/Parse/Parser.cpp:1271:12
#32 0x55b9932a31d0 in clang::Parser::ParseExternalDeclaration(clang::ParsedAttributes&, clang::ParsedAttributes&, clang::ParsingDeclSpec*) /home/vrukesh/LLVM-embedded-toolchain-for-Arm/build_sanitizer/_deps/llvmproject-src/clang/lib/Parse/Parser.cpp:1074:14
#33 0x55b99329edcf in clang::Parser::ParseTopLevelDecl(clang::OpaquePtr<clang::DeclGroupRef>&, clang::Sema::ModuleImportState&) /home/vrukesh/LLVM-embedded-toolchain-for-Arm/build_sanitizer/_deps/llvmproject-src/clang/lib/Parse/Parser.cpp:763:12

SUMMARY: AddressSanitizer: 2808 byte(s) leaked in 13 allocation(s).
error: command failed with exit status: 1`

[vrukesh]

Log snippet from latest code:

==3763537==ERROR: LeakSanitizer: detected memory leaks

Direct leak of 5832 byte(s) in 27 object(s) allocated from:
#0 0xae5147e3f0f4 in malloc /home/ubuntu/arm-toolchain/compiler-rt/lib/asan/asan_malloc_linux.cpp:67:3
#1 0xae514b0e8328 in safe_malloc /home/ubuntu/arm-toolchain/llvm/include/llvm/Support/MemAlloc.h:26:18
#2 0xae514b0e8328 in llvm::SmallVectorBase::grow_pod(void*, unsigned long, unsigned long) /home/ubuntu/arm-toolchain/llvm/lib/Support/SmallVector.cpp:151:15
#3 0xae51505e092c in grow_pod /home/ubuntu/arm-toolchain/llvm/include/llvm/ADT/SmallVector.h:139:11
#4 0xae51505e092c in grow /home/ubuntu/arm-toolchain/llvm/include/llvm/ADT/SmallVector.h:526:41
#5 0xae51505e092c in llvm::SmallVectorImplclang::TemplateArgument::operator=(llvm::SmallVectorImplclang::TemplateArgument const&) /home/ubuntu/arm-toolchain/llvm/include/llvm/ADT/SmallVector.h:1037:11
#6 0xae515112822c in operator= /home/ubuntu/arm-toolchain/llvm/include/llvm/ADT/SmallVector.h:1243:25
#7 0xae515112822c in operator= /home/ubuntu/arm-toolchain/clang/include/clang/AST/ASTConcept.h:37:7
#8 0xae515112822c in clang::MakeDeductionFailureInfo(clang::ASTContext&, clang::TemplateDeductionResult, clang::sema::TemplateDeductionInfo&) /home/ubuntu/arm-toolchain/clang/lib/Sema/SemaOverload.cpp:805:25
#9 0xae5151153e88 in AddMethodTemplateCandidateImmediately(clang::Sema&, clang::OverloadCandidateSet&, clang::FunctionTemplateDecl*, clang::DeclAccessPair, clang::CXXRecordDecl*, clang::TemplateArgumentListInfo*, clang::QualType, clang::Expr::Classification, llvm::ArrayRefclang::Expr*, bool, bool, clang::OverloadCandidateParamOrder) /home/ubuntu/arm-toolchain/clang/lib/Sema/SemaOverload.cpp:7929:11
#10 0xae515116f488 in AddTemplateOverloadCandidate /home/ubuntu/arm-toolchain/clang/lib/Sema/SemaOverload.cpp:11234:3
#11 0xae515116f488 in clang::OverloadCandidateSet::InjectNonDeducedTemplateCandidates(clang::Sema&) /home/ubuntu/arm-toolchain/clang/lib/Sema/SemaOverload.cpp:11270:7
#12 0xae51511486d8 in clang::OverloadCandidateSet::BestViableFunction(clang::Sema&, clang::SourceLocation, clang::OverloadCandidate*&) /home/ubuntu/arm-toolchain/clang/lib/Sema/SemaOverload.cpp:11361:3
#13 0xae51511942e8 in clang::Sema::BuildCallToObjectOfClassType(clang::Scope*, clang::Expr*, clang::SourceLocation, llvm::MutableArrayRefclang::Expr*, clang::SourceLocation) /home/ubuntu/arm-toolchain/clang/lib/Sema/SemaOverload.cpp:16421:24
#14 0xae51509cf6d4 in clang::Sema::BuildCallExpr(clang::Scope*, clang::Expr*, clang::SourceLocation, llvm::MutableArrayRefclang::Expr*, clang::SourceLocation, clang::Expr*, bool, bool) /home/ubuntu/arm-toolchain/clang/lib/Sema/SemaExpr.cpp:6636:14
#15 0xae51509fe080 in clang::Sema::ActOnCallExpr(clang::Scope*, clang::Expr*, clang::SourceLocation, llvm::MutableArrayRefclang::Expr*, clang::SourceLocation, clang::Expr*) /home/ubuntu/arm-toolchain/clang/lib/Sema/SemaExpr.cpp:6520:7
#16 0xae51500ff730 in clang::Parser::ParsePostfixExpressionSuffix(clang::ActionResult<clang::Expr*, true>) /home/ubuntu/arm-toolchain/clang/lib/Parse/ParseExpr.cpp:1893:23
#17 0xae5150104718 in clang::Parser::ParseCastExpression(clang::CastParseKind, bool, bool&, clang::TypoCorrectionTypeBehavior, bool, bool*) /home/ubuntu/arm-toolchain/clang/lib/Parse/ParseExpr.cpp:1622:9
#18 0xae5150106e40 in clang::Parser::ParseCastExpression(clang::CastParseKind, bool, bool&, clang::TypoCorrectionTypeBehavior, bool, bool*) /home/ubuntu/arm-toolchain/clang/lib/Parse/ParseExpr.cpp
#19 0xae51500fd728 in clang::Parser::ParseCastExpression(clang::CastParseKind, bool, clang::TypoCorrectionTypeBehavior, bool, bool*) /home/ubuntu/arm-toolchain/clang/lib/Parse/ParseExpr.cpp:567:20
#20 0xae515010d124 in clang::Parser::ParseParenExpression(clang::ParenParseOption&, bool, clang::ParenExprKind, clang::TypoCorrectionTypeBehavior, clang::OpaquePtrclang::QualType&, clang::SourceLocation&) /home/ubuntu/arm-toolchain/clang/lib/Parse/ParseExpr.cpp:2853:18
#21 0xae5150106e80 in clang::Parser::ParseCastExpression(clang::CastParseKind, bool, bool&, clang::TypoCorrectionTypeBehavior, bool, bool*) /home/ubuntu/arm-toolchain/clang/lib/Parse/ParseExpr.cpp:763:11
#22 0xae51500fb2a8 in ParseCastExpression /home/ubuntu/arm-toolchain/clang/lib/Parse/ParseExpr.cpp:567:20
#23 0xae51500fb2a8 in clang::Parser::ParseAssignmentExpression(clang::TypoCorrectionTypeBehavior) /home/ubuntu/arm-toolchain/clang/lib/Parse/ParseExpr.cpp:90:7
#24 0xae51500faf68 in clang::Parser::ParseExpression(clang::TypoCorrectionTypeBehavior) /home/ubuntu/arm-toolchain/clang/lib/Parse/ParseExpr.cpp:48:18
#25 0xae5150220900 in clang::Parser::ParseExprStatement(clang::Parser::ParsedStmtContext) /home/ubuntu/arm-toolchain/clang/lib/Parse/ParseStmt.cpp:521:19
#26 0xae515021de70 in clang::Parser::ParseStatementOrDeclarationAfterAttributes(llvm::SmallVector<clang::Stmt*, 24u>&, clang::Parser::ParsedStmtContext, clang::SourceLocation*, clang::ParsedAttributes&, clang::ParsedAttributes&) /home/ubuntu/arm-toolchain/clang/lib/Parse/ParseStmt.cpp:249:14
#27 0xae515021d0e0 in clang::Parser::ParseStatementOrDeclaration(llvm::SmallVector<clang::Stmt*, 24u>&, clang::Parser::ParsedStmtContext, clang::SourceLocation*) /home/ubuntu/arm-toolchain/clang/lib/Parse/ParseStmt.cpp:75:20
#28 0xae515022f578 in clang::Parser::ParseCompoundStatementBody(bool) /home/ubuntu/arm-toolchain/clang/lib/Parse/ParseStmt.cpp:1162:11
#29 0xae5150231e5c in clang::Parser::ParseFunctionStatementBody(clang::Decl*, clang::Parser::ParseScope&) /home/ubuntu/arm-toolchain/clang/lib/Parse/ParseStmt.cpp:2394:21
#30 0xae51500bdfec in clang::Parser::ParseFunctionDefinition(clang::ParsingDeclarator&, clang::Parser::ParsedTemplateInfo const&, clang::Parser::LateParsedAttrList*) /home/ubuntu/arm-toolchain/clang/lib/Parse/Parser.cpp:1449:10
#31 0xae515019b1d8 in clang::Parser::ParseDeclGroup(clang::ParsingDeclSpec&, clang::DeclaratorContext, clang::ParsedAttributes&, clang::Parser::ParsedTemplateInfo&, clang::SourceLocation*, clang::Parser::ForRangeInit*) /home/ubuntu/arm-toolchain/clang/lib/Parse/ParseDecl.cpp:2263:17
#32 0xae51500bb76c in clang::Parser::ParseDeclOrFunctionDefInternal(clang::ParsedAttributes&, clang::ParsedAttributes&, clang::ParsingDeclSpec&, clang::AccessSpecifier) /home/ubuntu/arm-toolchain/clang/lib/Parse/Parser.cpp:1187:10
#33 0xae51500bab14 in clang::Parser::ParseDeclarationOrFunctionDefinition(clang::ParsedAttributes&, clang::ParsedAttributes&, clang::ParsingDeclSpec*, clang::AccessSpecifier) /home/ubuntu/arm-toolchain/clang/lib/Parse/Parser.cpp:1209:12
#34 0xae51500b8390 in clang::Parser::ParseExternalDeclaration(clang::ParsedAttributes&, clang::ParsedAttributes&, clang::ParsingDeclSpec*) /home/ubuntu/arm-toolchain/clang/lib/Parse/Parser.cpp:1032:14
#35 0xae51500b4be4 in clang::Parser::ParseTopLevelDecl(clang::OpaquePtrclang::DeclGroupRef&, clang::Sema::ModuleImportState&) /home/ubuntu/arm-toolchain/clang/lib/Parse/Parser.cpp:745:12
#36 0xae51500955e8 in clang::ParseAST(clang::Sema&, bool, bool) /home/ubuntu/arm-toolchain/clang/lib/Parse/ParseAST.cpp:170:20

SUMMARY: AddressSanitizer: 5832 byte(s) leaked in 27 allocation(s).
==3763500==LeakSanitizer: checking for leaks
==3765630==SuspendAllThreads retry: 0

error: command failed with exit status: 1

Attaching the detailed logs.

atfe_sanitizer_log_29082025.zip

[vrukesh]

Issue is reproducible with llvm-project and libcxx tests.

`cd /home/ubuntu/llvm-project/
git pull

Build the compiler
rm -Rf build_sanitizer;
mkdir build_sanitizer; cd build_sanitizer;

cmake -G Ninja ../llvm -DCMAKE_BUILD_TYPE=Release -DCMAKE_C_COMPILER=clang -DCMAKE_CXX_COMPILER=clang++ -DLLVM_ENABLE_ASSERTIONS=True -DLLVM_LIT_ARGS="-v" -DCMAKE_INSTALL_PREFIX=../stage1.install -DLLVM_TARGETS_TO_BUILD=AArch64 -DLLVM_ENABLE_PROJECTS="clang-tools-extra;clang;llvm" -DLLVM_ENABLE_RUNTIMES="libcxx;libcxxabi;libunwind;compiler-rt"

ninja -j64

Build libcpp
cd /home/ubuntu/llvm-project/
rm -Rf build_libcxx;
mkdir build_libcxx; cd build_libcxx;
cmake -G Ninja ../runtimes -DLLVM_TARGETS_TO_BUILD=AArch64 -DLLVM_ENABLE_RUNTIMES="libcxx;libcxxabi;libunwind;compiler-rt" -DCMAKE_C_COMPILER=/home/ubuntu/llvm-project/build_sanitizer/bin/clang -DCMAKE_CXX_COMPILER=/home/ubuntu/llvm-project/build_sanitizer/bin/clang++

ninja -j64

Compile clang with sanitizers
cd /home/ubuntu/llvm-project/
rm -Rf build_clang_with_libcxx;
mkdir build_clang_with_libcxx; cd build_clang_with_libcxx;

export LD_LIBRARY_PATH="/home/ubuntu/llvm-project/build_libcxx/lib:$LD_LIBRARY_PATH"

cmake -G Ninja ../llvm -DCMAKE_BUILD_TYPE=Release -DLLVM_USE_SANITIZER="Address;Undefined" -DCMAKE_C_COMPILER=/home/ubuntu/llvm-project/build_sanitizer/bin/clang -DCMAKE_CXX_COMPILER=/home/ubuntu/llvm-project/build_sanitizer/bin/clang++ -DLLVM_ENABLE_ASSERTIONS=True -DLLVM_LIT_ARGS="-v" -DCMAKE_INSTALL_PREFIX=../stage1.install -DLLVM_TARGETS_TO_BUILD=AArch64 -DLLVM_ENABLE_PROJECTS="clang-tools-extra;clang;llvm" -DLLVM_ENABLE_RUNTIMES="libcxx;libcxxabi;libunwind;compiler-rt"

ninja -j64
ninja -j64 check-cxx
`

[DavidSpickett]

Please reduce this down to single input to clang that will trigger this problem. Start by finding a single test file, then cut it down from there. From the traceback, it's something in clang's parser which is probably why it'll happen in some libcxx tests.