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llvm-capstone/llvm/utils/llvm.grm
Tong Zhang 17ce89fa80 [SanitizerBounds] Add support for NoSanitizeBounds function 
Currently adding attribute no_sanitize("bounds") isn't disabling
-fsanitize=local-bounds (also enabled in -fsanitize=bounds). The Clang
frontend handles fsanitize=array-bounds which can already be disabled by
no_sanitize("bounds"). However, instrumentation added by the
BoundsChecking pass in the middle-end cannot be disabled by the
attribute.

The fix is very similar to D102772 that added the ability to selectively
disable sanitizer pass on certain functions.

In this patch, if no_sanitize("bounds") is provided, an additional
function attribute (NoSanitizeBounds) is attached to IR to let the
BoundsChecking pass know we want to disable local-bounds checking. In
order to support this feature, the IR is extended (similar to D102772)
to make Clang able to preserve the information and let BoundsChecking
pass know bounds checking is disabled for certain function.

Reviewed By: melver

Differential Revision: https://reviews.llvm.org/D119816
2022-03-01 18:47:02 +01:00

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(*
polygen grammar for LLVM assembly language.
This file defines an LLVM assembly language grammar for polygen,
which is a tool for generating random text based on a grammar.
It is strictly syntax-based, and makes no attempt to generate
IR that is semantically valid. Most of the IR produced doesn't
pass the Verifier.
TODO: Metadata, in all its forms
*)
I ::= "title: LLVM assembly language\n"
^ "status: experimental\n"
^ "audience: LLVM developers\n"
;
S ::= Module ;
(*
Define rules for non-keyword tokens. This is currently just a bunch
of hacks. They don't cover many valid forms of tokens, and they also
generate some invalid forms of tokens. The LLVM parser has custom
C++ code to lex these; custom C++ code for emitting them would be
convenient, but polygen doesn't support that.
*)
NonZeroDecimalDigit ::= 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 ;
DecimalDigit ::= 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 ;
DecimalDigitSeq ::= DecimalDigit [^ DecimalDigitSeq ];
HexDigit ::= 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9
| a | b | c | d | e | f ;
HexDigitSeq ::= HexDigit [^ HexDigitSeq ];
StringChar ::= a | b | c | d | e | f | g | h | i | j | k | l | m
| n | o | p | q | r | s | t | u | v | w | x | y | z ;
StringConstantSeq ::= StringChar [^ StringConstantSeq ];
StringConstant ::= StringChar [^ StringConstantSeq ];
EUINT64VAL ::= NonZeroDecimalDigit [^ DecimalDigitSeq ];
ESINT64VAL ::= [ "-" ] ^ EUINT64VAL ;
EUAPINTVAL ::= EUINT64VAL ;
ESAPINTVAL ::= ESINT64VAL ;
LOCALVALID ::= "%" ^ DecimalDigitSeq ;
GLOBALVALID ::= "@" ^ DecimalDigitSeq ;
INTTYPE ::= "i" ^ EUINT64VAL ;
GLOBALVAR ::= "@" ^ StringConstant ;
LOCALVAR ::= "%" ^ StringConstant ;
STRINGCONSTANT ::= "\"" ^ StringConstant ^ "\"" ;
ATSTRINGCONSTANT ::= "@" ^ STRINGCONSTANT ;
PCTSTRINGCONSTANT ::= "%" ^ STRINGCONSTANT ;
LABELSTR ::= StringConstant ;
FPVAL ::= ESAPINTVAL ^ "." ^ EUAPINTVAL | "0x" ^ HexDigitSeq ;
(*
The rest of this file is derived directly from llvmAsmParser.y.
*)
ArithmeticOps ::= + OptNW add | fadd | OptNW sub | fsub | OptNW mul | fmul |
udiv | OptExact sdiv | fdiv | urem | srem | frem ;
LogicalOps ::= shl | lshr | ashr | and | or | xor;
CastOps ::= trunc | zext | sext | fptrunc | fpext | bitcast |
uitofp | sitofp | fptoui | fptosi | inttoptr | ptrtoint ;
IPredicates ::= eq | ne | slt | sgt | sle | sge | ult | ugt | ule | uge ;
FPredicates ::= oeq | one | olt | ogt | ole | oge | ord | uno | ueq | une
| ult | ugt | ule | uge | true | false ;
IntType ::= INTTYPE;
FPType ::= half | bfloat | float | double | "ppc_fp128" | fp128 | "x86_fp80";
LocalName ::= LOCALVAR | STRINGCONSTANT | PCTSTRINGCONSTANT ;
OptLocalName ::= LocalName | _ ;
OptAddrSpace ::= - addrspace ^ "(" ^ EUINT64VAL ^ ")" | _ ;
OptLocalAssign ::= LocalName "=" | _ ;
GlobalName ::= GLOBALVAR | ATSTRINGCONSTANT ;
OptGlobalAssign ::= GlobalAssign | _ ;
GlobalAssign ::= GlobalName "=" ;
GVInternalLinkage
::= + internal
| weak
| "weak_odr"
| linkonce
| "linkonce_odr"
| appending
| dllexport
| common
| private
;
GVExternalLinkage
::= dllimport
| "extern_weak"
| + external
;
GVVisibilityStyle
::= + _
| default
| hidden
| protected
;
FunctionDeclareLinkage
::= + _
| dllimport
| "extern_weak"
;
FunctionDefineLinkage
::= + _
| internal
| linkonce
| "linkonce_odr"
| weak
| "weak_odr"
| dllexport
;
AliasLinkage ::= + _ | weak | "weak_odr" | internal ;
OptCallingConv ::= + _ |
ccc |
fastcc |
coldcc |
"x86_stdcallcc" |
"x86_fastcallcc" |
cc EUINT64VAL ;
ParamAttr ::= zeroext
| signext
| inreg
| sret
| noalias
| nocapture
| byval
| nest
| align EUINT64VAL
;
OptParamAttrs ::= + _ | OptParamAttrs ParamAttr ;
RetAttr ::= inreg
| zeroext
| signext
| noalias
;
OptRetAttrs ::= _
| OptRetAttrs RetAttr
;
FuncAttr ::= noreturn
| nounwind
| inreg
| zeroext
| signext
| readnone
| readonly
| inlinehint
| alignstack
| noinline
| alwaysinline
| optsize
| ssp
| sspreq
| returns_twice
| nonlazybind
| sanitize_address
| sanitize_thread
| sanitize_memory
| mustprogress
| nosanitize_bounds
| nosanitize_coverage
;
OptFuncAttrs ::= + _ | OptFuncAttrs FuncAttr ;
OptGC ::= + _ | gc STRINGCONSTANT ;
OptAlign ::= + _ | align EUINT64VAL ;
OptCAlign ::= + _ | ^ "," align EUINT64VAL ;
SectionString ::= section STRINGCONSTANT ;
OptSection ::= + _ | SectionString ;
GlobalVarAttributes ::= + _ | ^ "," GlobalVarAttribute GlobalVarAttributes ;
GlobalVarAttribute ::= SectionString | align EUINT64VAL ;
PrimType ::= INTTYPE | half | bfloat | float | double | "ppc_fp128" | fp128
| "x86_fp80" | "x86_mmx" | "x86_amx" | - label ;
Types
::= opaque
| PrimType
| Types OptAddrSpace ^ "*"
| SymbolicValueRef
| "\\" ^ EUINT64VAL
| Types "(" ^ ArgTypeListI ^ ")" OptFuncAttrs
| void "(" ^ ArgTypeListI ^ ")" OptFuncAttrs
| "[" ^ EUINT64VAL "x" Types ^ "]"
| "<" ^ EUINT64VAL "x" Types ^ ">"
| "{" TypeListI "}"
| "{" ^ "}"
| "<" ^ "{" TypeListI "}" ^ ">"
| "<" ^ "{" ^ "}" ^ ">"
;
ArgType ::= Types OptParamAttrs ;
ResultTypes ::= Types | void ;
ArgTypeList ::= ArgType | ArgTypeList ^ "," ArgType ;
ArgTypeListI ::= ArgTypeList | ArgTypeList ^ "," "..." | "..." | _ ;
TypeListI ::= Types | TypeListI ^ "," Types ;
ConstVal::= Types "[" ^ ConstVector ^ "]"
| Types "[" ^ "]"
| Types "c" ^ STRINGCONSTANT
| Types "<" ^ ConstVector ^ ">"
| Types "{" ConstVector "}"
| Types "{" ^ "}"
| Types "<" ^ "{" ConstVector "}" ^ ">"
| Types "<" ^ "{" ^ "}" ^ ">"
| Types null
| Types undef
| Types SymbolicValueRef
| Types ConstExpr
| Types zeroinitializer
| Types ESINT64VAL
| Types ESAPINTVAL
| Types EUINT64VAL
| Types EUAPINTVAL
| Types true
| Types false
| Types FPVAL ;
ConstExpr::= CastOps "(" ^ ConstVal to Types ^ ")"
| getelementptr OptInBounds "(" ^ ConstVal IndexList ^ ")"
| select "(" ^ ConstVal ^ "," ConstVal ^ "," ConstVal ^ ")"
| ArithmeticOps "(" ^ ConstVal ^ "," ConstVal ^ ")"
| LogicalOps "(" ^ ConstVal ^ "," ConstVal ^ ")"
| icmp IPredicates "(" ^ ConstVal ^ "," ConstVal ^ ")"
| fcmp FPredicates "(" ^ ConstVal ^ "," ConstVal ^ ")"
| extractelement "(" ^ ConstVal ^ "," ConstVal ^ ")"
| insertelement "(" ^ ConstVal ^ "," ConstVal ^ "," ConstVal ^ ")"
| shufflevector "(" ^ ConstVal ^ "," ConstVal ^ "," ConstVal ^ ")"
| extractvalue "(" ^ ConstVal ^ ConstantIndexList ^ ")"
| insertvalue "(" ^ ConstVal ^ "," ConstVal ^ ConstantIndexList ^ ")" ;
ConstVector ::= ConstVector ^ "," ConstVal | ConstVal ;
GlobalType ::= global | constant ;
ThreadLocal ::= - "thread_local" | _ ;
AliaseeRef ::= ResultTypes SymbolicValueRef
| bitcast "(" ^ AliaseeRef to Types ^ ")" ;
Module ::= +++ DefinitionList | --- _ ;
DefinitionList ::= - Definition | + DefinitionList Definition ;
Definition
::= ^ ( +++++ define Function
| declare FunctionProto
| - module asm AsmBlock
| OptLocalAssign type Types
| OptGlobalAssign GVVisibilityStyle ThreadLocal OptAddrSpace GlobalType
ConstVal GlobalVarAttributes
| OptGlobalAssign GVInternalLinkage GVVisibilityStyle ThreadLocal OptAddrSpace
GlobalType ConstVal GlobalVarAttributes
| OptGlobalAssign GVExternalLinkage GVVisibilityStyle ThreadLocal OptAddrSpace
GlobalType Types GlobalVarAttributes
| OptGlobalAssign GVVisibilityStyle alias AliasLinkage AliaseeRef
| target TargetDefinition
| deplibs "=" LibrariesDefinition
) ^ "\n";
AsmBlock ::= STRINGCONSTANT ;
TargetDefinition ::= triple "=" STRINGCONSTANT
| datalayout "=" STRINGCONSTANT ;
LibrariesDefinition ::= "[" ( LibList | _ ) "]";
LibList ::= LibList ^ "," STRINGCONSTANT | STRINGCONSTANT ;
ArgListH ::= ArgListH ^ "," Types OptParamAttrs OptLocalName
| Types OptParamAttrs OptLocalName ;
ArgList ::= ArgListH | ArgListH ^ "," "..." | "..." | _ ;
FunctionHeaderH ::= OptCallingConv OptRetAttrs ResultTypes
GlobalName ^ "(" ^ ArgList ^ ")"
OptFuncAttrs OptSection OptAlign OptGC ;
BEGIN ::= ( begin | "{" ) ^ "\n";
FunctionHeader ::=
FunctionDefineLinkage GVVisibilityStyle FunctionHeaderH BEGIN ;
END ::= ^ ( end | "}" ) ^ "\n";
Function ::= BasicBlockList END ;
FunctionProto ::= FunctionDeclareLinkage GVVisibilityStyle FunctionHeaderH ;
OptSideEffect ::= _ | sideeffect ;
ConstValueRef ::= ESINT64VAL
| EUINT64VAL
| FPVAL
| true
| false
| null
| undef
| zeroinitializer
| "<" ConstVector ">"
| "[" ConstVector "]"
| "[" ^ "]"
| "c" ^ STRINGCONSTANT
| "{" ConstVector "}"
| "{" ^ "}"
| "<" ^ "{" ConstVector "}" ^ ">"
| "<" ^ "{" ^ "}" ^ ">"
| ConstExpr
| asm OptSideEffect STRINGCONSTANT ^ "," STRINGCONSTANT ;
SymbolicValueRef ::= LOCALVALID
| GLOBALVALID
| LocalName
| GlobalName ;
ValueRef ::= SymbolicValueRef | ConstValueRef;
ResolvedVal ::= Types ValueRef ;
ReturnedVal ::= ResolvedVal | ReturnedVal ^ "," ResolvedVal ;
BasicBlockList ::= BasicBlockList BasicBlock | FunctionHeader BasicBlock ;
BasicBlock ::= InstructionList OptLocalAssign BBTerminatorInst ;
InstructionList ::= +++ InstructionList Inst
| - _
| ^ LABELSTR ^ ":\n" ;
BBTerminatorInst ::= ^ " " ^
( ret ReturnedVal
| ret void
| br label ValueRef
| br INTTYPE ValueRef ^ "," label ValueRef ^ "," label ValueRef
| switch IntType ValueRef ^ "," label ValueRef "[" JumpTable "]"
| switch IntType ValueRef ^ "," label ValueRef "[" ^ "]"
| invoke OptCallingConv ResultTypes ValueRef ^ "(" ^ ParamList ^ ")"
OptFuncAttrs
to label ValueRef unwind label ValueRef
| unwind
| unreachable ) ^ "\n";
JumpTable ::= JumpTable IntType ConstValueRef ^ "," label ValueRef
| IntType ConstValueRef ^ "," label ValueRef ;
Inst ::= ^ " " ^ OptLocalAssign InstVal ^ "\n";
PHIList ::= Types "[" ValueRef ^ "," ValueRef "]"
| PHIList ^ "," "[" ValueRef ^ "," ValueRef "]" ;
ParamList ::= Types OptParamAttrs ValueRef OptParamAttrs
| label OptParamAttrs ValueRef OptParamAttrs
| ParamList ^ "," Types OptParamAttrs ValueRef OptParamAttrs
| ParamList ^ "," label OptParamAttrs ValueRef OptParamAttrs
| - _ ;
IndexList ::= _ | IndexList ^ "," ResolvedVal ;
ConstantIndexList ::= "," EUINT64VAL | ConstantIndexList ^ "," EUINT64VAL ;
OptTailCall ::= tail call | call ;
InstVal ::=
ArithmeticOps Types ValueRef ^ "," ValueRef
| LogicalOps Types ValueRef ^ "," ValueRef
| icmp IPredicates Types ValueRef ^ "," ValueRef
| fcmp FPredicates Types ValueRef ^ "," ValueRef
| CastOps ResolvedVal to Types
| select ResolvedVal ^ "," ResolvedVal ^ "," ResolvedVal
| "va_arg" ResolvedVal ^ "," Types
| extractelement ResolvedVal ^ "," ResolvedVal
| insertelement ResolvedVal ^ "," ResolvedVal ^ "," ResolvedVal
| shufflevector ResolvedVal ^ "," ResolvedVal ^ "," ResolvedVal
| phi PHIList
| OptTailCall OptCallingConv ResultTypes ValueRef ^ "(" ^ ParamList ^ ")"
OptFuncAttrs
| MemoryInst ;
OptVolatile ::= - volatile | _ ;
OptExact ::= - exact | _ ;
OptNSW ::= - nsw | _ ;
OptNUW ::= - nuw | _ ;
OptNW ::= OptNUW OptNSW | OptNSW OptNUW ;
OptInBounds ::= - inbounds | _ ;
MemoryInst ::= malloc Types OptCAlign
| malloc Types ^ "," INTTYPE ValueRef OptCAlign
| alloca Types OptCAlign
| alloca Types ^ "," INTTYPE ValueRef OptCAlign
| free ResolvedVal
| OptVolatile load Types ValueRef OptCAlign
| OptVolatile store ResolvedVal ^ "," Types ValueRef OptCAlign
| getresult Types ValueRef ^ "," EUINT64VAL
| getelementptr OptInBounds Types ValueRef IndexList
| extractvalue Types ValueRef ^ ConstantIndexList
| insertvalue Types ValueRef ^ "," Types ValueRef ^ ConstantIndexList ;
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