Crash with dot syntax on class methods

[llvmbot]

Bugzilla Link	3769
Resolution	FIXED
Resolved on	Mar 10, 2009 13:07
Version	unspecified
OS	MacOS X
Attachments	Test file
Reporter	LLVM Bugzilla Contributor

Extended Description

r66472 crashes on the attached preprocessed file.

[lattner]

Steve, can you take a look?

[llvmbot]

Will do...

[llvmbot]

This doesn't crash for me. What platform? switches? Need more info to debug...

[steve-naroffs-imac-2:~/llvm/tools/clang] snaroff% cat crash.m
@​interface Test {}

• (Test *)crash;
  @​end

@​implementation Test

• (void)cachesPath
  {
  static Test *cachesPath;

if (!cachesPath) {
Test *crash = Test.crash;
}
}

@​end
[steve-naroffs-imac-2:~/llvm/tools/clang] snaroff% ../../Debug/bin/clang crash.m
crash.m:5:1: warning: incomplete implementation
@​implementation Test
^
crash.m:5:1: warning: method definition for 'crash' not found
2 diagnostics generated.

[llvmbot]

Mac OS 10.5.6, x86

Palantir:Downloads david$ $CCC clang_crash.mi
0 clang 0x00c84d48 main + 12795048
1 clang 0x00c85269 main + 12796361
2 libSystem.B.dylib 0x958992bb _sigtramp + 43
3 libSystem.B.dylib 0xffffffff _sigtramp + 1786146159
4 clang 0x000a4136 main + 340118
5 clang 0x000ab9b0 main + 370960
6 clang 0x0008e67d main + 251357
7 clang 0x000a9ad9 main + 363065
8 clang 0x000a4136 main + 340118
9 clang 0x00082fbe main + 204574
10 clang 0x000e4383 main + 602851
11 clang 0x000e80ea main + 618570
12 clang 0x000ea204 main + 627044
13 clang 0x000ea79d main + 628477
14 clang 0x000e7e77 main + 617943
15 clang 0x000e9e22 main + 626050
16 clang 0x000e8176 main + 618710
17 clang 0x000ea204 main + 627044
18 clang 0x000ea79d main + 628477
19 clang 0x000e7e77 main + 617943
20 clang 0x000ab84c main + 370604
21 clang 0x000f6828 main + 677768
22 clang 0x000fe34f main + 709295
23 clang 0x0000fe3c _mh_execute_header + 60988
24 clang 0x001abc99 main + 1420281
25 clang 0x000509f0 _mh_execute_header + 326128
26 clang 0x000519e4 main + 2372
27 clang 0x00001b36 _mh_execute_header + 2870
Stack dump:
0. Program arguments: clang -S -disable-free --relocation-model=pic --disable-fp-elim --unwind-tables=0 --mcpu=yonah --fmath-errno=0 -mmacosx-version-min=10.5.6 -arch i386 -o /var/folders/UR/URbGRONaEkGOsh6q3vgVBE+++TI/-Tmp-/tmpUCqRQs.s -x objective-c-cpp-output clang_crash.mi

1. clang_crash.m:16:1: current parser token '@'
2. clang_crash.m:7:1: LLVM IR generation of declaration 'cachesPath'
3. clang_crash.m:8:1: LLVM IR generation of compound statement ('{}')
4. clang_crash.m:11:19: LLVM IR generation of compound statement ('{}')

[lattner]

David, is this with SVN mainline or some checker build?

[llvmbot]

trunk @ r66472, release-asserts build

[lattner]

Steve, maybe this would show under valgrind?

[llvmbot]

valgrind says everything is o.k. I am able to reproduce this when I run with "-S". Will investigate.

[llvmbot]

(gdb) run crash.m -S
Starting program: /Users/snaroff/llvm/Debug/bin/clang crash.m -S

Program received signal EXC_BAD_ACCESS, Could not access memory.
Reason: KERN_PROTECTION_FAILURE at address: 0x00000004
0x0013d161 in clang::Stmt::getStmtClass (this=0x0) at Stmt.h:152
warning: Source file is more recent than executable.
152 StmtClass getStmtClass() const { return sClass; }
(gdb) where
#​0 0x0013d161 in clang::Stmt::getStmtClass (this=0x0) at Stmt.h:152
#​1 0x00166311 in clang::Expr::classof (T=0x0) at Expr.h:268
#​2 0x00242f5d in llvm::isa_impl<clang::Expr, clang::Stmt> (Val=@0x0) at Casting.h:54
#​3 0x00167ed5 in llvm::isa_impl_wrap<clang::Expr, clang::Stmt const, clang::Stmt const>::doit (Val=@0x0) at Casting.h:71
#​4 0x00242f75 in llvm::isa_impl_clclang::Stmt::isaclang::Expr (Val=@0x0) at Casting.h:83
#​5 0x00167eed in llvm::isa_impl_clclang::Stmt*::isaclang::Expr (Val=0x0) at Casting.h:101
#​6 0x00242f8f in llvm::isa<clang::Expr, clang::Stmt*> (Val=@0x2308cec) at Casting.h:116
#​7 0x00242fac in llvm::cast<clang::Expr, clang::Stmt*> (Val=@0x2308cec) at Casting.h:199
#​8 0x00266626 in clang::ObjCKVCRefExpr::getBase (this=0x2308cd0) at ExprObjC.h:284
#​9 0x00096066 in clang::CodeGen::CodeGenFunction::EmitObjCPropertyGet (this=0xbfffea50, Exp=0x2308cd0) at CGObjC.cpp:333
#​10 0x0007810d in clang::CodeGen::CodeGenFunction::EmitLoadOfKVCRefLValue (this=0xbfffea50, LV={LVType = clang::CodeGen::LValue::KVCRef, V = 0x20, {VectorIdx = 0x2308cd0, VectorElts = 0x2308cd0, BitfieldData = {StartBit = 36048, Size = 560, IsSigned = 142}, PropertyRefExpr = 0x2308cd0, KVCRefExpr = 0x2308cd0}, Volatile = false, Restrict = false, Ivar = false, NonGC = false, ObjCType = 0}, ExprType={Value = {Value = 36734832}}) at CGExpr.cpp:337
#​11 0x0007b3af in clang::CodeGen::CodeGenFunction::EmitLoadOfLValue (this=0xbfffea50, LV={LVType = clang::CodeGen::LValue::KVCRef, V = 0x20, {VectorIdx = 0x2308cd0, VectorElts = 0x2308cd0, BitfieldData = {StartBit = 36048, Size = 560, IsSigned = 142}, PropertyRefExpr = 0x2308cd0, KVCRefExpr = 0x2308cd0}, Volatile = false, Restrict = false, Ivar = false, NonGC = false, ObjCType = 0}, ExprType={Value = {Value = 36734832}}) at CGExpr.cpp:263
#​12 0x00090bb0 in (anonymous namespace)::ScalarExprEmitter::EmitLoadOfLValue (this=0xbfffe398, LV={LVType = clang::CodeGen::LValue::KVCRef, V = 0x20, {VectorIdx = 0x2308cd0, VectorElts = 0x2308cd0, BitfieldData = {StartBit = 36048, Size = 560, IsSigned = 142}, PropertyRefExpr = 0x2308cd0, KVCRefExpr = 0x2308cd0}, Volatile = false, Restrict = false, Ivar = false, NonGC = false, ObjCType = 0}, T={Value = {Value = 36734832}}) at CGExprScalar.cpp:65
#​13 0x00090c53 in (anonymous namespace)::ScalarExprEmitter::EmitLoadOfLValue (this=0xbfffe398, E=0x2308cd0) at CGExprScalar.cpp:73
#​14 0x00090eec in (anonymous namespace)::ScalarExprEmitter::VisitObjCKVCRefExpr (this=0xbfffe398, E=0x2308cd0) at CGExprScalar.cpp:154
#​15 0x000948d1 in clang::StmtVisitor<(anonymous namespace)::ScalarExprEmitter, llvm::Value*>::Visit (this=0xbfffe398, S=0x2308cd0) at StmtNodes.def:130
#​16 0x0008eee7 in clang::CodeGen::CodeGenFunction::EmitScalarExpr (this=0xbfffea50, E=0x2308cd0) at CGExprScalar.cpp:1339
#​17 0x00076cbd in clang::CodeGen::CodeGenFunction::EmitLocalBlockVarDecl (this=0xbfffea50, D=@0x2308c80) at CGDecl.cpp:321
#​18 0x000775ca in clang::CodeGen::CodeGenFunction::EmitBlockVarDecl (this=0xbfffea50, D=@0x2308c80) at CGDecl.cpp:74
#​19 0x00077716 in clang::CodeGen::CodeGenFunction::EmitDecl (this=0xbfffea50, D=@0x2308c80) at CGDecl.cpp:47
#​20 0x000bcfb8 in clang::CodeGen::CodeGenFunction::EmitDeclStmt (this=0xbfffea50, S=@0x2308d00) at CGStmt.cpp:500
#​21 0x000bf149 in clang::CodeGen::CodeGenFunction::EmitStmt (this=0xbfffea50, S=0x2308d00) at CGStmt.cpp:80
#​22 0x000c051e in clang::CodeGen::CodeGenFunction::EmitCompoundStmt (this=0xbfffea50, S=@0x2308d20, GetLast=false, AggLoc=0x0, isAggVol=false) at CGStmt.cpp:144
#​23 0x000c0745 in clang::CodeGen::CodeGenFunction::EmitSimpleStmt (this=0xbfffea50, S=0x2308d20) at CGStmt.cpp:110
#​24 0x000bef04 in clang::CodeGen::CodeGenFunction::EmitStmt (this=0xbfffea50, S=0x2308d20) at CGStmt.cpp:43
#​25 0x000c0344 in clang::CodeGen::CodeGenFunction::EmitIfStmt (this=0xbfffea50, S=@0x2308d50) at CGStmt.cpp:286
#​26 0x000bf0ae in clang::CodeGen::CodeGenFunction::EmitStmt (this=0xbfffea50, S=0x2308d50) at CGStmt.cpp:74
#​27 0x000c051e in clang::CodeGen::CodeGenFunction::EmitCompoundStmt (this=0xbfffea50, S=@0x2308d70, GetLast=false, AggLoc=0x0, isAggVol=false) at CGStmt.cpp:144
#​28 0x000c0745 in clang::CodeGen::CodeGenFunction::EmitSimpleStmt (this=0xbfffea50, S=0x2308d70) at CGStmt.cpp:110
#​29 0x000bef04 in clang::CodeGen::CodeGenFunction::EmitStmt (this=0xbfffea50, S=0x2308d70) at CGStmt.cpp:43
#​30 0x0009767c in clang::CodeGen::CodeGenFunction::GenerateObjCMethod (this=0xbfffea50, OMD=0x2308990) at CGObjC.cpp:134
#​31 0x000cc38d in clang::CodeGen::CodeGenModule::EmitTopLevelDecl (this=0x280f000, D=0x2308990) at CodeGenModule.cpp:1269
#​32 0x000daea7 in (anonymous namespace)::CodeGeneratorImpl::HandleTopLevelDecl (this=0x2304710, D=0x2308990) at ModuleBuilder.cpp:72
#​33 0x00014438 in (anonymous namespace)::BackendConsumer::HandleTopLevelDecl (this=0x23045b0, D=0x2308990) at Backend.cpp:132
#​34 0x00178b2a in clang::ParseAST (PP=@0x2304300, Consumer=0x23045b0, TU=0x23053b0, PrintStats=false) at ParseAST.cpp:71
#​35 0x0004ff85 in ProcessInputFile (PP=@0x2304300, PPF=@0xbffff7ec, InFile=@0x2302610, PA=EmitAssembly) at clang.cpp:1387
#​36 0x0005085c in main (argc=3, argv=0xbffff8cc) at clang.cpp:1586
(gdb)

[llvmbot]

(gdb) run crash.m -S
Starting program: /Users/snaroff/llvm/Debug/bin/clang crash.m -S

Program received signal EXC_BAD_ACCESS, Could not access memory.
Reason: KERN_PROTECTION_FAILURE at address: 0x00000004
0x0013d161 in clang::Stmt::getStmtClass (this=0x0) at Stmt.h:152
warning: Source file is more recent than executable.
152 StmtClass getStmtClass() const { return sClass; }
(gdb) where
#​0 0x0013d161 in clang::Stmt::getStmtClass (this=0x0) at Stmt.h:152
#​1 0x00166311 in clang::Expr::classof (T=0x0) at Expr.h:268
#​2 0x00242f5d in llvm::isa_impl<clang::Expr, clang::Stmt> (Val=@0x0) at
Casting.h:54
#​3 0x00167ed5 in llvm::isa_impl_wrap<clang::Expr, clang::Stmt const,
clang::Stmt const>::doit (Val=@0x0) at Casting.h:71
#​4 0x00242f75 in llvm::isa_impl_clclang::Stmt::isaclang::Expr (Val=@0x0)
at Casting.h:83
#​5 0x00167eed in llvm::isa_impl_clclang::Stmt*::isaclang::Expr (Val=0x0)
at Casting.h:101
#​6 0x00242f8f in llvm::isa<clang::Expr, clang::Stmt*> (Val=@0x2308cec) at
Casting.h:116
#​7 0x00242fac in llvm::cast<clang::Expr, clang::Stmt*> (Val=@0x2308cec) at
Casting.h:199
#​8 0x00266626 in clang::ObjCKVCRefExpr::getBase (this=0x2308cd0) at
ExprObjC.h:284
#​9 0x00096066 in clang::CodeGen::CodeGenFunction::EmitObjCPropertyGet
(this=0xbfffea50, Exp=0x2308cd0) at CGObjC.cpp:333
#​10 0x0007810d in clang::CodeGen::CodeGenFunction::EmitLoadOfKVCRefLValue
(this=0xbfffea50, LV={LVType = clang::CodeGen::LValue::KVCRef, V = 0x20,
{VectorIdx = 0x2308cd0, VectorElts = 0x2308cd0, BitfieldData = {StartBit =
36048, Size = 560, IsSigned = 142}, PropertyRefExpr = 0x2308cd0, KVCRefExpr =
0x2308cd0}, Volatile = false, Restrict = false, Ivar = false, NonGC = false,
ObjCType = 0}, ExprType={Value = {Value = 36734832}}) at CGExpr.cpp:337
#​11 0x0007b3af in clang::CodeGen::CodeGenFunction::EmitLoadOfLValue
(this=0xbfffea50, LV={LVType = clang::CodeGen::LValue::KVCRef, V = 0x20,
{VectorIdx = 0x2308cd0, VectorElts = 0x2308cd0, BitfieldData = {StartBit =
36048, Size = 560, IsSigned = 142}, PropertyRefExpr = 0x2308cd0, KVCRefExpr =
0x2308cd0}, Volatile = false, Restrict = false, Ivar = false, NonGC = false,
ObjCType = 0}, ExprType={Value = {Value = 36734832}}) at CGExpr.cpp:263
#​12 0x00090bb0 in (anonymous namespace)::ScalarExprEmitter::EmitLoadOfLValue
(this=0xbfffe398, LV={LVType = clang::CodeGen::LValue::KVCRef, V = 0x20,
{VectorIdx = 0x2308cd0, VectorElts = 0x2308cd0, BitfieldData = {StartBit =
36048, Size = 560, IsSigned = 142}, PropertyRefExpr = 0x2308cd0, KVCRefExpr =
0x2308cd0}, Volatile = false, Restrict = false, Ivar = false, NonGC = false,
ObjCType = 0}, T={Value = {Value = 36734832}}) at CGExprScalar.cpp:65
#​13 0x00090c53 in (anonymous namespace)::ScalarExprEmitter::EmitLoadOfLValue
(this=0xbfffe398, E=0x2308cd0) at CGExprScalar.cpp:73
#​14 0x00090eec in (anonymous namespace)::ScalarExprEmitter::VisitObjCKVCRefExpr
(this=0xbfffe398, E=0x2308cd0) at CGExprScalar.cpp:154
#​15 0x000948d1 in clang::StmtVisitor<(anonymous namespace)::ScalarExprEmitter,
llvm::Value*>::Visit (this=0xbfffe398, S=0x2308cd0) at StmtNodes.def:130
#​16 0x0008eee7 in clang::CodeGen::CodeGenFunction::EmitScalarExpr
(this=0xbfffea50, E=0x2308cd0) at CGExprScalar.cpp:1339
#​17 0x00076cbd in clang::CodeGen::CodeGenFunction::EmitLocalBlockVarDecl
(this=0xbfffea50, D=@0x2308c80) at CGDecl.cpp:321
#​18 0x000775ca in clang::CodeGen::CodeGenFunction::EmitBlockVarDecl
(this=0xbfffea50, D=@0x2308c80) at CGDecl.cpp:74
#​19 0x00077716 in clang::CodeGen::CodeGenFunction::EmitDecl (this=0xbfffea50,
D=@0x2308c80) at CGDecl.cpp:47
#​20 0x000bcfb8 in clang::CodeGen::CodeGenFunction::EmitDeclStmt
(this=0xbfffea50, S=@0x2308d00) at CGStmt.cpp:500
#​21 0x000bf149 in clang::CodeGen::CodeGenFunction::EmitStmt (this=0xbfffea50,
S=0x2308d00) at CGStmt.cpp:80
#​22 0x000c051e in clang::CodeGen::CodeGenFunction::EmitCompoundStmt
(this=0xbfffea50, S=@0x2308d20, GetLast=false, AggLoc=0x0, isAggVol=false) at
CGStmt.cpp:144
#​23 0x000c0745 in clang::CodeGen::CodeGenFunction::EmitSimpleStmt
(this=0xbfffea50, S=0x2308d20) at CGStmt.cpp:110
#​24 0x000bef04 in clang::CodeGen::CodeGenFunction::EmitStmt (this=0xbfffea50,
S=0x2308d20) at CGStmt.cpp:43
#​25 0x000c0344 in clang::CodeGen::CodeGenFunction::EmitIfStmt (this=0xbfffea50,
S=@0x2308d50) at CGStmt.cpp:286
#​26 0x000bf0ae in clang::CodeGen::CodeGenFunction::EmitStmt (this=0xbfffea50,
S=0x2308d50) at CGStmt.cpp:74
#​27 0x000c051e in clang::CodeGen::CodeGenFunction::EmitCompoundStmt
(this=0xbfffea50, S=@0x2308d70, GetLast=false, AggLoc=0x0, isAggVol=false) at
CGStmt.cpp:144
#​28 0x000c0745 in clang::CodeGen::CodeGenFunction::EmitSimpleStmt
(this=0xbfffea50, S=0x2308d70) at CGStmt.cpp:110
#​29 0x000bef04 in clang::CodeGen::CodeGenFunction::EmitStmt (this=0xbfffea50,
S=0x2308d70) at CGStmt.cpp:43
#​30 0x0009767c in clang::CodeGen::CodeGenFunction::GenerateObjCMethod
(this=0xbfffea50, OMD=0x2308990) at CGObjC.cpp:134
#​31 0x000cc38d in clang::CodeGen::CodeGenModule::EmitTopLevelDecl
(this=0x280f000, D=0x2308990) at CodeGenModule.cpp:1269
#​32 0x000daea7 in (anonymous namespace)::CodeGeneratorImpl::HandleTopLevelDecl
(this=0x2304710, D=0x2308990) at ModuleBuilder.cpp:72
#​33 0x00014438 in (anonymous namespace)::BackendConsumer::HandleTopLevelDecl
(this=0x23045b0, D=0x2308990) at Backend.cpp:132
#​34 0x00178b2a in clang::ParseAST (PP=@0x2304300, Consumer=0x23045b0,
TU=0x23053b0, PrintStats=false) at ParseAST.cpp:71
#​35 0x0004ff85 in ProcessInputFile (PP=@0x2304300, PPF=@0xbffff7ec,
InFile=@0x2302610, PA=EmitAssembly) at clang.cpp:1387
#​36 0x0005085c in main (argc=3, argv=0xbffff8cc) at clang.cpp:1586
(gdb)

ir gen fixed in tot at:
http://llvm.org/viewvc/llvm-project?view=rev&revision=66556