[cfe-dev] clang CRASH parsing c++11 literal operator
David Blaikie
dblaikie at gmail.com
Mon Jan 14 08:24:49 PST 2013
On Jan 14, 2013 6:59 AM, "Kal Conley" <kcconley at gmail.com> wrote:
>
> Heads up!
> Its easy to crash clang 3.2 with this input:
>
> template<...>
> int operator"" _b();
> int main() { return 0_b; }
>
> Output:
>
> user-defined-literals-crash.cc:1:13: error: expected template parameter
> template<...>
> ^
> user-defined-literals-crash.cc:2:5: error: no function template matches
> function template specialization 'operator "" _b'
> int operator"" _b();
> ^
> 0 clang 0x00000000019ede2f
> 1 clang 0x00000000019ee2182 libpthread.so.0 0x00007f9266cfc030
> 3 clang 0x0000000000a8ab27
> clang::Sema::LookupLiteralOperator(clang::Scope*, clang::LookupResult&,
> llvm::ArrayRef<clang::QualType>, bool) + 151
> 4 clang 0x0000000000a02953
> clang::Sema::ActOnNumericConstant(clang::Token const&, clang::Scope*) +
851
> 5 clang 0x00000000008c61f3
> clang::Parser::ParseCastExpression(bool, bool, bool&,
> clang::Parser::TypeCastState) + 259
> 6 clang 0x00000000008c3876
> clang::Parser::ParseAssignmentExpression(clang::Parser::TypeCastState) +
118
> 7 clang 0x00000000008c37ec
> clang::Parser::ParseExpression(clang::Parser::TypeCastState) + 12
> 8 clang 0x00000000008ef3dc
> clang::Parser::ParseReturnStatement() + 412
> 9 clang 0x00000000008eafa2
>
clang::Parser::ParseStatementOrDeclarationAfterAttributes(llvm::SmallVector<clang::Stmt*,
> 32u>&, bool, clang::SourceLocation*,
> clang::Parser::ParsedAttributesWithRange&) + 1618
> 10 clang 0x00000000008ea8ea
> clang::Parser::ParseStatementOrDeclaration(llvm::SmallVector<clang::Stmt*,
> 32u>&, bool, clang::SourceLocation*) + 154
> 11 clang 0x00000000008f0b59
> clang::Parser::ParseCompoundStatementBody(bool) + 569
> 12 clang 0x00000000008f2951
> clang::Parser::ParseFunctionStatementBody(clang::Decl*,
> clang::Parser::ParseScope&) + 161
> 13 clang 0x000000000089cc88
> clang::Parser::ParseFunctionDefinition(clang::ParsingDeclarator&,
> clang::Parser::ParsedTemplateInfo const&,
> clang::Parser::LateParsedAttrList*) + 2440
> 14 clang 0x00000000008a9002
> clang::Parser::ParseDeclGroup(clang::ParsingDeclSpec&, unsigned int,
> bool, clang::SourceLocation*, clang::Parser::ForRangeInit*) + 1442
> 15 clang 0x000000000089c2ef
>
clang::Parser::ParseDeclOrFunctionDefInternal(clang::Parser::ParsedAttributesWithRange&,
> clang::ParsingDeclSpec&, clang::AccessSpecifier) + 831
> 16 clang 0x000000000089bd61
>
clang::Parser::ParseDeclarationOrFunctionDefinition(clang::Parser::ParsedAttributesWithRange&,
> clang::ParsingDeclSpec*, clang::AccessSpecifier) + 241
> 17 clang 0x000000000089b485
>
clang::Parser::ParseExternalDeclaration(clang::Parser::ParsedAttributesWithRange&,
> clang::ParsingDeclSpec*) + 2357
> 18 clang 0x000000000089aaca
> clang::Parser::ParseTopLevelDecl(clang::OpaquePtr<clang::DeclGroupRef>&)
> + 314
> 19 clang 0x0000000000897bc6 clang::ParseAST(clang::Sema&,
> bool, bool) + 326
> 20 clang 0x0000000000795694
> clang::CodeGenAction::ExecuteAction() + 996
> 21 clang 0x0000000000664823 clang::FrontendAction::Execute() +
83
> 22 clang 0x000000000064ae3d
> clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) + 909
> 23 clang 0x0000000000634842
> clang::ExecuteCompilerInvocation(clang::CompilerInstance*) + 3602
> 24 clang 0x000000000062c53b cc1_main(char const**, char
> const**, char const*, void*) + 795
> 25 clang 0x00000000006308c8 main + 696
> 26 libc.so.6 0x00007f9265dd1ead __libc_start_main + 253
> 27 clang 0x000000000062c159
> Stack dump:
> 0. Program arguments: /opt/bin/clang -cc1 -triple
> x86_64-unknown-linux-gnu -emit-obj -mrelax-all -disable-free
> -disable-llvm-verifier -main-file-name user-defined-literals-crash.cc
> -mrelocation-model static -mdisable-fp-elim -fmath-errno -masm-verbose
> -mconstructor-aliases -munwind-tables -fuse-init-array -target-cpu
> x86-64 -target-linker-version 2.22 -momit-leaf-frame-pointer
> -resource-dir /opt/bin/../lib/clang/3.2 -fmodule-cache-path
> /var/tmp/clang-module-cache -internal-isystem
> /usr/lib/gcc/x86_64-linux-gnu/4.7/../../../../include/c++/4.7
> -internal-isystem
>
/usr/lib/gcc/x86_64-linux-gnu/4.7/../../../../include/c++/4.7/x86_64-linux-gnu
> -internal-isystem
> /usr/lib/gcc/x86_64-linux-gnu/4.7/../../../../include/c++/4.7/backward
> -internal-isystem /usr/local/include -internal-isystem
> /opt/bin/../lib/clang/3.2/include -internal-externc-isystem
> /usr/include/x86_64-linux-gnu -internal-externc-isystem /include
> -internal-externc-isystem /usr/include -std=c++11 -fdeprecated-macro
> -fdebug-compilation-dir /home/kal/devel/user-defined-literals
> -ferror-limit 19 -fmessage-length 190 -mstackrealign -fobjc-runtime=gcc
> -fcxx-exceptions -fexceptions -fdiagnostics-show-option
> -fcolor-diagnostics -o /tmp/user-defined-literals-crash-jccQn7.o -x c++
> user-defined-literals-crash.cc
> 1. user-defined-literals-crash.cc:3:21: current parser token '0_b'
> 2. user-defined-literals-crash.cc:3:12: parsing function body 'main'
> 3. user-defined-literals-crash.cc:3:12: in compound statement ('{}')
> clang: error: unable to execute command: Segmentation fault
> clang: error: clang frontend command failed due to signal (use -v to see
> invocation)
> clang version 3.2 (tags/RELEASE_32/final 170703)
> Target: x86_64-unknown-linux-gnu
> Thread model: posix
> clang: note: diagnostic msg: PLEASE submit a bug report to
> http://llvm.org/bugs/ and include the crash backtrace, preprocessed
> source, and associated run script.
As per these instructions, please file a bug at llvm.org/bugs
> clang: note: diagnostic msg:
> ********************
>
> PLEASE ATTACH THE FOLLOWING FILES TO THE BUG REPORT:
> Preprocessed source(s) and associated run script(s) are located at:
> clang: note: diagnostic msg: /tmp/user-defined-literals-crash-izTAuB.cpp
> clang: note: diagnostic msg: /tmp/user-defined-literals-crash-izTAuB.sh
> clang: note: diagnostic msg:
>
> ********************
>
> _______________________________________________
> cfe-dev mailing list
> cfe-dev at cs.uiuc.edu
> http://lists.cs.uiuc.edu/mailman/listinfo/cfe-dev
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