<div dir="ltr">I also got crash with this commit:<div><br></div><div><div>0x0000000000f52d4b in (anonymous namespace)::CStringChecker::InvalidateBuffer(clang::ento::CheckerContext&, llvm::IntrusiveRefCntPtr<clang::ento::ProgramState const>, clang::Expr const*, clang::ento::SVal, bool, clang::Expr const*) () at llvm/tools/clang/lib/StaticAnalyzer/Checkers/CStringChecker.cpp:859</div><div>859 const MemRegion *R = BufEnd.getAsRegion();</div><div><br></div><div><br></div><div>#0 0x0000000000f52d4b in (anonymous namespace)::CStringChecker::InvalidateBuffer(clang::ento::CheckerContext&, llvm::IntrusiveRefCntPtr<clang::ento::ProgramState const>, clang::Expr const*, clang::ento::SVal, bool, clang::Expr const*) () at llvm/tools/clang/lib/StaticAnalyzer/Checkers/CStringChecker.cpp:859</div><div>#1 0x0000000000f54a52 in (anonymous namespace)::CStringChecker::evalCopyCommon(clang::ento::CheckerContext&, clang::CallExpr const*, llvm::IntrusiveRefCntPtr<clang::ento::ProgramState const>, clang::Expr const*, clang::Expr const*, clang::Expr const*, bool, bool) const ()</div><div> at llvm/tools/clang/lib/StaticAnalyzer/Checkers/CStringChecker.cpp:1079</div><div>#2 0x0000000000f559fc in (anonymous namespace)::CStringChecker::evalMemcpy(clang::ento::CheckerContext&, clang::CallExpr const*) const ()</div><div> at llvm/tools/clang/lib/StaticAnalyzer/Checkers/CStringChecker.cpp:1101</div><div>#3 0x0000000000f51e5d in bool clang::ento::eval::Call::_evalCall<(anonymous namespace)::CStringChecker>(void*, clang::CallExpr const*, clang::ento::CheckerContext&) ()</div><div> at llvm/tools/clang/lib/StaticAnalyzer/Checkers/CStringChecker.cpp:2002</div><div>#4 0x0000000000fae631 in clang::ento::CheckerManager::runCheckersForEvalCall(clang::ento::ExplodedNodeSet&, clang::ento::ExplodedNodeSet const&, clang::ento::CallEvent const&, clang::ento::ExprEngine&) () at llvm/tools/clang/include/clang/StaticAnalyzer/Core/CheckerManager.h:58</div><div>#5 0x0000000000fe40de in clang::ento::ExprEngine::evalCall(clang::ento::ExplodedNodeSet&, clang::ento::ExplodedNode*, clang::ento::CallEvent const&) ()</div><div> at llvm/tools/clang/lib/StaticAnalyzer/Core/ExprEngineCallAndReturn.cpp:528</div><div>#6 0x0000000000fe43ec in clang::ento::ExprEngine::VisitCallExpr(clang::CallExpr const*, clang::ento::ExplodedNode*, clang::ento::ExplodedNodeSet&) ()</div><div> at llvm/tools/clang/lib/StaticAnalyzer/Core/ExprEngineCallAndReturn.cpp:499</div><div>#7 0x0000000000fd4c96 in clang::ento::ExprEngine::Visit(clang::Stmt const*, clang::ento::ExplodedNode*, clang::ento::ExplodedNodeSet&) ()</div><div> at llvm/tools/clang/lib/StaticAnalyzer/Core/ExprEngine.cpp:1075</div><div>#8 0x0000000000fd6726 in clang::ento::ExprEngine::ProcessStmt(clang::CFGStmt, clang::ento::ExplodedNode*) ()</div><div> at llvm/tools/clang/lib/StaticAnalyzer/Core/ExprEngine.cpp:446</div><div>#9 0x0000000000fd6f24 in clang::ento::ExprEngine::processCFGElement(clang::CFGElement, clang::ento::ExplodedNode*, unsigned int, clang::ento::NodeBuilderContext*) ()</div><div> at llvm/tools/clang/lib/StaticAnalyzer/Core/ExprEngine.cpp:295</div><div>#10 0x0000000000fb746e in clang::ento::CoreEngine::HandlePostStmt(clang::CFGBlock const*, unsigned int, clang::ento::ExplodedNode*) ()</div><div> at llvm/tools/clang/lib/StaticAnalyzer/Core/CoreEngine.cpp:503</div><div>#11 0x0000000000fb7607 in clang::ento::CoreEngine::dispatchWorkItem(clang::ento::ExplodedNode*, clang::ProgramPoint, clang::ento::WorkListUnit const&) ()</div><div> at llvm/tools/clang/lib/StaticAnalyzer/Core/CoreEngine.cpp:267</div><div>#12 0x0000000000fb7708 in clang::ento::CoreEngine::ExecuteWorkList(clang::LocationContext const*, unsigned int, llvm::IntrusiveRefCntPtr<clang::ento::ProgramState const>) ()</div><div>#13 0x00000000007d4bd1 in (anonymous namespace)::AnalysisConsumer::ActionExprEngine ()</div><div>#14 0x00000000007d5343 in (anonymous namespace)::AnalysisConsumer::HandleCode(clang::Decl*, unsigned int, clang::ento::ExprEngine::InliningModes, llvm::DenseSet<clang::Decl const*, llvm::DenseMapInfo<clang::Decl const*> >*) ()</div><div>#15 0x00000000007e021d in (anonymous namespace)::AnalysisConsumer::HandleTranslationUnit ()</div><div>#16 0x000000000082daa8 in clang::MultiplexConsumer::HandleTranslationUnit(clang::ASTContext&) ()</div><div> at llvm/tools/clang/lib/Frontend/MultiplexConsumer.cpp:296</div><div>#17 0x00000000008be045 in clang::ParseAST(clang::Sema&, bool, bool) () at llvm/tools/clang/lib/Parse/ParseAST.cpp:168</div><div>#18 0x0000000000812e36 in clang::FrontendAction::Execute() ()</div><div>#19 0x00000000007eda8f in clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) ()</div><div>#20 0x00000000007ab25c in clang::tooling::FrontendActionFactory::runInvocation(clang::CompilerInvocation*, clang::FileManager*, std::shared_ptr<clang::PCHContainerOperations>, clang::DiagnosticConsumer*) () at llvm/tools/clang/lib/Tooling/Tooling.cpp:274</div><div>#21 0x00000000007a8861 in clang::tooling::ToolInvocation::runInvocation(char const*, clang::driver::Compilation*, clang::CompilerInvocation*, std::shared_ptr<clang::PCHContainerOperations>) () at llvm/tools/clang/lib/Tooling/Tooling.cpp:250</div><div>#22 0x00000000007a9e24 in clang::tooling::ToolInvocation::run() () at llvm/tools/clang/lib/Tooling/Tooling.cpp:235</div><div>#23 0x00000000007aa7d2 in clang::tooling::ClangTool::run(clang::tooling::ToolAction*) () at llvm/tools/clang/lib/Tooling/Tooling.cpp:369</div><div>#24 0x000000000067a650 in clang::tidy::runClangTidy(std::unique_ptr<clang::tidy::ClangTidyOptionsProvider, std::default_delete<clang::tidy::ClangTidyOptionsProvider> >, clang::tooling::CompilationDatabase const&, llvm::ArrayRef<std::string>, std::vector<clang::tidy::ClangTidyError, std::allocator<clang::tidy::ClangTidyError> >*, clang::tidy::ProfileData*) () at llvm/tools/clang/tools/extra/clang-tidy/ClangTidy.cpp:408</div></div><div><br></div><div><div>Memcpy usage in file that crash:</div><div>std::memcpy(somelocalvar.data, someparam.somememer.data(), somelocalvar.size * sizeof(u8));</div><div>std::memcpy(&(someparam.somemember[somelocal]),</div><div> somelocal[i].data,</div><div> somelocal[i].size);</div><div>std::memcpy(someparam.somemember[someparam.somemember].data,</div><div> somelocal[0].data,</div><div> somelocal[0].size);</div></div><div><br></div><div>Issue cause by commit: 93968</div><div><br></div></div><div class="gmail_extra"><br><div class="gmail_quote">2015-08-31 21:04 GMT+02:00 Gábor Horváth <span dir="ltr"><<a href="mailto:cfe-commits@lists.llvm.org" target="_blank">cfe-commits@lists.llvm.org</a>></span>:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">xazax.hun added a comment.<br>
<br>
Hi!<br>
<br>
With this patch committed I noticed a regression in the static analyzer.<br>
<br>
I analyzed openssl-1.0.0d (using the test suite in utils/analyzer/SATestBuild.py).<br>
I got the following assertion error:<br>
(lldb) bt<br>
<br>
- thread #1: tid = 0xa1fcb, 0x00007fff943e50ae libsystem_kernel.dylib`__pthread_kill + 10, queue = 'com.apple.main-thread', stop reason = signal SIGABRT<br>
- frame #0: 0x00007fff943e50ae libsystem_kernel.dylib`__pthread_kill + 10 frame #1: 0x00007fff943f25fd libsystem_pthread.dylib`pthread_kill + 90 frame #2: 0x0000000100960106 clang`::abort() [inlined] raise(sig=6) + 18 at Signals.inc:504 frame #3: 0x00000001009600f4 clang`::abort() + 4 at Signals.inc:521 frame #4: 0x00000001009600e1 clang`::__assert_rtn(func=<unavailable>, file=<unavailable>, line=<unavailable>, expr=<unavailable>) + 81 at Signals.inc:517 frame #5: 0x00000001018fc418 clang`(anonymous namespace)::CStringChecker::InvalidateBuffer(clang::ento::CheckerContext&, llvm::IntrusiveRefCntPtr<clang::ento::ProgramState const>, clang::Expr const*, clang::ento::SVal, bool, clang::Expr const*) [inlined] clang::ento::NonLoc clang::ento::SVal::castAs<clang::ento::NonLoc>() const + 1448 at SVals.h:76 frame #6: 0x00000001018fc3f9 clang`(anonymous namespace)::CStringChecker::InvalidateBuffer(clang::ento::CheckerContext&, llvm::IntrusiveRefCntPtr<clang::ento::ProgramState const>, clang::Expr const*, clang::ento::SVal, bool, clang::Expr const*) [inlined] (anonymous namespace)::CStringChecker::IsFirstBufInBound(state=clang::ento::ProgramStateRef @ 0x0000000103bf2080, FirstBuf=0x0000000103a86768) at CStringChecker.cpp:842 frame #7: 0x00000001018fc3f9 clang`(anonymous namespace)::CStringChecker::InvalidateBuffer(C=<unavailable>, state=<unavailable>, E=0x0000000103a86768, V=<unavailable>, IsSourceBuffer=<unavailable>, Size=<unavailable>) + 1417 at CStringChecker.cpp:920 frame #8: 0x00000001018fadf7 clang`(anonymous namespace)::CStringChecker::evalCopyCommon(this=0x0000000103212fb0, C=0x00007fff5fbfc1a0, CE=<unavailable>, state=clang::ento::ProgramStateRef @ 0x00007fff5fbfc0c0, Size=0x0000000103a867b0, Dest=0x0000000103a86768, Source=<unavailable>, Restricted=<unavailable>, IsMempcpy=<unavailable>) const + 3991 at CStringChecker.cpp:1079 frame #9: 0x00000001018f8ad8 clang`(anonymous namespace)::CStringChecker::evalMemcpy(this=0x0000000103212fb0, C=0x00007fff5fbfc1a0, CE=0x0000000103a86720) const + 248 at CStringChecker.cpp:1101 frame #10: 0x00000001018f89b6 clang`bool clang::ento::eval::Call::_evalCall<(anonymous namespace)::CStringChecker>(void*, clang::CallExpr const*, clang::ento::CheckerContext&) [inlined] (anonymous namespace)::CStringChecker::evalCall(CE=0x0000000103a86720, C=0x00007fff5fbfc1a0) const + 655 at CStringChecker.cpp:2002 frame #11: 0x00000001018f8727 clang`bool clang::ento::eval::Call::_evalCall<(anonymous namespace)::CStringChecker>(checker=0x0000000103212fb0, CE=0x0000000103a86720, C=0x00007fff5fbfc1a0) + 23 at Checker.h:438 frame #12: 0x0000000101a0417d clang`clang::ento::CheckerManager::runCheckersForEvalCall(clang::ento::ExplodedNodeSet&, clang::ento::ExplodedNodeSet const&, clang::ento::CallEvent const&, clang::ento::ExprEngine&) [inlined] clang::ento::CheckerFn<bool (clang::CallExpr const*, clang::ento::CheckerContext&)>::operator(this=<unavailable>, ps=<unavailable>)(clang::CallExpr const*, clang::ento::CheckerContext&) const + 653 at CheckerManager.h:58 frame #13: 0x0000000101a0416b clang`clang::ento::CheckerManager::runCheckersForEvalCall(this=0x0000000103211950, Dst=0x00007fff5fbfc2d8, Src=<unavailable>, Call=0x0000000103ac2070, Eng=0x00007fff5fbfcd90) + 635 at CheckerManager.cpp:549 frame #14: 0x0000000101a361af clang`clang::ento::ExprEngine::evalCall(this=0x00007fff5fbfcd90, Dst=0x00007fff5fbfc448, Pred=<unavailable>, Call=0x0000000103ac2070) + 383 at ExprEngineCallAndReturn.cpp:527 frame #15: 0x0000000101a35ee0 clang`clang::ento::ExprEngine::VisitCallExpr(this=0x00007fff5fbfcd90, CE=0x0000000103a86720, Pred=<unavailable>, dst=0x00007fff5fbfc9b8) + 528 at ExprEngineCallAndReturn.cpp:499 frame #16: 0x0000000101a1b4a0 clang`clang::ento::ExprEngine::Visit(this=0x00007fff5fbfcd90, S=0x0000000103a86720, Pred=<unavailable>, DstTop=<unavailable>) + 12224 at ExprEngine.cpp:1075 frame #17: 0x0000000101a16c30 clang`clang::ento::ExprEngine::ProcessStmt(this=0x00007fff5fbfcd90, S=<unavailable>, Pred=<unavailable>) + 880 at ExprEngine.cpp:446 frame #18: 0x0000000101a1681e clang`clang::ento::ExprEngine::processCFGElement(this=<unavailable>, E=<unavailable>, Pred=0x0000000103bf1be0, StmtIdx=<unavailable>, Ctx=0x00007fff5fbfcc98) + 190 at ExprEngine.cpp:295 frame #19: 0x0000000101a0c128 clang`clang::ento::CoreEngine::HandlePostStmt(this=<unavailable>, B=<unavailable>, StmtIdx=<unavailable>, Pred=<unavailable>) + 136 at CoreEngine.cpp:503 frame #20: 0x0000000101a0b71b clang`clang::ento::CoreEngine::ExecuteWorkList(this=0x00007fff5fbfcda8, L=<unavailable>, Steps=150000, InitState=clang::ento::ProgramStateRef @ 0x00007fff5fbfd120) + 491 at CoreEngine.cpp:223 frame #21: 0x00000001012698a0 clang`(anonymous namespace)::AnalysisConsumer::ActionExprEngine(clang::Decl*, bool, clang::ento::ExprEngine::InliningModes, llvm::DenseSet<clang::Decl const*, llvm::DenseMapInfo<clang::Decl const*> >*) [inlined] clang::ento::ExprEngine::ExecuteWorkList(L=0x00000001032c84a0, Steps=<unavailable>) + 35 at ExprEngine.h:109 frame #22: 0x000000010126987d clang`(anonymous namespace)::AnalysisConsumer::ActionExprEngine(this=0x0000000103211090, D=0x00000001039b8418, ObjCGCEnabled=<unavailable>, IMode=<unavailable>, VisitedCallees=<unavailable>) + 973 at AnalysisConsumer.cpp:659 frame #23: 0x000000010126931d clang`(anonymous namespace)::AnalysisConsumer::HandleCode(clang::Decl*, unsigned int, clang::ento::ExprEngine::InliningModes, llvm::DenseSet<clang::Decl const*, llvm::DenseMapInfo<clang::Decl const*> >*) [inlined] (anonymous namespace)::AnalysisConsumer::RunPathSensitiveChecks(this=<unavailable>, D=<unavailable>, IMode=<unavailable>, Visited=<unavailable>) + 1501 at AnalysisConsumer.cpp:689 frame #24: 0x00000001012692c9 clang`(anonymous namespace)::AnalysisConsumer::HandleCode(this=<unavailable>, D=<unavailable>, Mode=<unavailable>, IMode=Inline_Regular, VisitedCallees=<unavailable>) + 1417 at AnalysisConsumer.cpp:627 frame #25: 0x000000010125bd31 clang`(anonymous namespace)::AnalysisConsumer::HandleTranslationUnit(clang::ASTContext&) + 743 at AnalysisConsumer.cpp:491 frame #26: 0x000000010125ba4a clang`(anonymous namespace)::AnalysisConsumer::HandleTranslationUnit(this=0x0000000103211090, C=<unavailable>) + 650 at AnalysisConsumer.cpp:542 frame #27: 0x0000000101274065 clang`clang::ParseAST(S=0x0000000103858a00, PrintStats=false, SkipFunctionBodies=<unavailable>) + 581 at ParseAST.cpp:168 frame #28: 0x0000000100d96adb clang`clang::FrontendAction::Execute(this=<unavailable>) + 75 at FrontendAction.cpp:439 frame #29: 0x0000000100d621eb clang`clang::CompilerInstance::ExecuteAction(this=0x0000000103208240, Act=0x0000000103209ae0) + 843 at CompilerInstance.cpp:830 frame #30: 0x0000000100dd48bf clang`clang::ExecuteCompilerInvocation(Clang=0x0000000103208240) + 4047 at ExecuteCompilerInvocation.cpp:222 frame #31: 0x000000010000608c clang`cc1_main(Argv=<unavailable>, Argv0="/Users/ghorvath/Documents/LLVM/build/bin/clang", MainAddr=0x0000000100001df0) + 1180 at cc1_main.cpp:116 frame #32: 0x0000000100004cc9 clang`main [inlined] ExecuteCC1Tool(Tool=<unavailable>) + 83 at driver.cpp:380 frame #33: 0x0000000100004c76 clang`main(argc_=<unavailable>, argv_=<unavailable>) + 11830 at driver.cpp:443 frame #34: 0x00007fff881eb5ad libdyld.dylib`start + 1 frame #35: 0x00007fff881eb5ad libdyld.dylib`start + 1<br>
<br>
Could you look into this?<br>
<div class="HOEnZb"><div class="h5"><br>
<br>
Repository:<br>
rL LLVM<br>
<br>
<a href="http://reviews.llvm.org/D11832" rel="noreferrer" target="_blank">http://reviews.llvm.org/D11832</a><br>
<br>
<br>
<br>
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</div></div></blockquote></div><br><br clear="all"><div><br></div>-- <br><div class="gmail_signature">inż. Piotr Zegar<br><a href="mailto:me@piotrzegar.pl" target="_blank">me@piotrzegar.pl</a><br><a href="http://www.piotrzegar.pl" target="_blank">http://www.piotrzegar.pl</a></div>
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