CGException.cpp File Reference

#include "CGCXXABI.h"
#include "CGCleanup.h"
#include "CGObjCRuntime.h"
#include "CodeGenFunction.h"
#include "ConstantEmitter.h"
#include "TargetInfo.h"
#include "clang/AST/Mangle.h"
#include "clang/AST/StmtCXX.h"
#include "clang/AST/StmtObjC.h"
#include "clang/AST/StmtVisitor.h"
#include "clang/Basic/DiagnosticSema.h"
#include "llvm/IR/IntrinsicInst.h"
#include "llvm/IR/Intrinsics.h"
#include "llvm/IR/IntrinsicsWebAssembly.h"
#include "llvm/Support/SaveAndRestore.h"

Go to the source code of this file.

Functions
static llvm::FunctionCallee	getFreeExceptionFn (CodeGenModule &CGM)
static llvm::FunctionCallee	getSehTryBeginFn (CodeGenModule &CGM)
static llvm::FunctionCallee	getSehTryEndFn (CodeGenModule &CGM)
static llvm::FunctionCallee	getUnexpectedFn (CodeGenModule &CGM)
static llvm::FunctionCallee	getCatchallRethrowFn (CodeGenModule &CGM, StringRef Name)
static const EHPersonality &	getCPersonality (const TargetInfo &Target, const LangOptions &L)
static const EHPersonality &	getObjCPersonality (const TargetInfo &Target, const LangOptions &L)
static const EHPersonality &	getCXXPersonality (const TargetInfo &Target, const LangOptions &L)
static const EHPersonality &	getObjCXXPersonality (const TargetInfo &Target, const LangOptions &L)
	Determines the personality function to use when both C++ and Objective-C exceptions are being caught.
static const EHPersonality &	getSEHPersonalityMSVC (const llvm::Triple &T)
static llvm::FunctionCallee	getPersonalityFn (CodeGenModule &CGM, const EHPersonality &Personality)
static llvm::Constant *	getOpaquePersonalityFn (CodeGenModule &CGM, const EHPersonality &Personality)
static bool	LandingPadHasOnlyCXXUses (llvm::LandingPadInst *LPI)
	Check whether a landingpad instruction only uses C++ features.
static bool	PersonalityHasOnlyCXXUses (llvm::Constant *Fn)
	Check whether a personality function could reasonably be swapped for a C++ personality function.
static llvm::Constant *	getCatchAllValue (CodeGenFunction &CGF)
	Returns the value to inject into a selector to indicate the presence of a catch-all.
static void	emitFilterDispatchBlock (CodeGenFunction &CGF, EHFilterScope &filterScope)
	Emit the dispatch block for a filter scope if necessary.
static bool	isNonEHScope (const EHScope &S)
	Check whether this is a non-EH scope, i.e.
static void	emitCatchPadBlock (CodeGenFunction &CGF, EHCatchScope &CatchScope)
static void	emitWasmCatchPadBlock (CodeGenFunction &CGF, EHCatchScope &CatchScope)
static void	emitCatchDispatchBlock (CodeGenFunction &CGF, EHCatchScope &catchScope)
	Emit the structure of the dispatch block for the given catch scope.

Function Documentation

emitCatchDispatchBlock()

static void emitCatchDispatchBlock ( CodeGenFunction &  CGF, EHCatchScope &  catchScope  )

static

Emit the structure of the dispatch block for the given catch scope.

It is an invariant that the dispatch block already exists.

Definition at line 1117 of file CGException.cpp.

References clang::CodeGen::EHCatchScope::Handler::Block, clang::CodeGen::CodeGenFunction::Builder, clang::CodeGen::CodeGenFunction::CGM, clang::CodeGen::CodeGenFunction::createBasicBlock(), clang::Default, clang::CodeGen::CodeGenFunction::EmitBlock(), clang::CodeGen::CodeGenFunction::EmitBlockAfterUses(), emitCatchPadBlock(), emitWasmCatchPadBlock(), clang::CodeGen::CatchTypeInfo::Flags, clang::CodeGen::EHPersonality::get(), clang::CodeGen::EHScope::getCachedEHDispatchBlock(), clang::CodeGen::CodeGenFunction::getEHDispatchBlock(), clang::CodeGen::EHScope::getEnclosingEHScope(), clang::CodeGen::CodeGenModule::GetGlobalVarAddressSpace(), clang::CodeGen::EHCatchScope::getHandler(), clang::CodeGen::CodeGenModule::getIntrinsic(), clang::CodeGen::EHCatchScope::getNumHandlers(), clang::CodeGen::CodeGenFunction::getSelectorFromSlot(), clang::CodeGen::CodeGenFunction::getTargetHooks(), clang::CodeGen::EHCatchScope::Handler::isCatchAll(), clang::CodeGen::TargetCodeGenInfo::performAddrSpaceCast(), clang::CodeGen::CatchTypeInfo::RTTI, clang::CodeGen::EHCatchScope::Handler::Type, and clang::CodeGen::CodeGenTypeCache::VoidPtrTy.

emitCatchPadBlock()

static void emitCatchPadBlock ( CodeGenFunction &  CGF, EHCatchScope &  CatchScope  )

static

Definition at line 965 of file CGException.cpp.

References clang::CodeGen::EHCatchScope::Handler::Block, clang::CodeGen::CodeGenFunction::Builder, clang::CodeGen::CodeGenFunction::CurrentFuncletPad, clang::CodeGen::CodeGenFunction::EmitBlockAfterUses(), clang::CodeGen::EHPersonality::get(), clang::CodeGen::EHScope::getCachedEHDispatchBlock(), clang::CodeGen::CodeGenFunction::getEHDispatchBlock(), clang::CodeGen::EHScope::getEnclosingEHScope(), clang::CodeGen::EHCatchScope::getHandler(), clang::CodeGen::CodeGenFunction::getLLVMContext(), clang::CodeGen::EHCatchScope::getNumHandlers(), clang::CodeGen::EHCatchScope::Handler::Type, and clang::CodeGen::CodeGenTypeCache::VoidPtrTy.

Referenced by emitCatchDispatchBlock().

emitFilterDispatchBlock()

static void emitFilterDispatchBlock ( CodeGenFunction &  CGF, EHFilterScope &  filterScope  )

static

Emit the dispatch block for a filter scope if necessary.

Definition at line 542 of file CGException.cpp.

References clang::CodeGen::CodeGenFunction::Builder, clang::CodeGen::CodeGenFunction::CGM, clang::CodeGen::CodeGenFunction::createBasicBlock(), clang::CodeGen::CodeGenFunction::EmitBlock(), clang::CodeGen::CodeGenFunction::EmitBlockAfterUses(), clang::CodeGen::CodeGenFunction::EmitRuntimeCall(), clang::CodeGen::EHScope::getCachedEHDispatchBlock(), clang::CodeGen::CodeGenFunction::getEHResumeBlock(), clang::CodeGen::CodeGenFunction::getExceptionFromSlot(), clang::CodeGen::EHFilterScope::getNumFilters(), clang::CodeGen::CodeGenFunction::getSelectorFromSlot(), and getUnexpectedFn().

emitWasmCatchPadBlock()

static void emitWasmCatchPadBlock ( CodeGenFunction &  CGF, EHCatchScope &  CatchScope  )

static

Definition at line 1008 of file CGException.cpp.

References clang::CodeGen::EHCatchScope::Handler::Block, clang::CodeGen::CodeGenFunction::Builder, clang::CodeGen::CodeGenFunction::CGM, clang::CodeGen::CodeGenFunction::createBasicBlock(), clang::CodeGen::CGBuilderTy::CreateStore(), clang::CodeGen::CodeGenFunction::CurrentFuncletPad, E, clang::CodeGen::CodeGenFunction::EmitBlock(), clang::CodeGen::CodeGenFunction::EmitBlockAfterUses(), clang::CodeGen::EHScope::getCachedEHDispatchBlock(), clang::CodeGen::CodeGenFunction::getEHDispatchBlock(), clang::CodeGen::EHScope::getEnclosingEHScope(), clang::CodeGen::CodeGenFunction::getExceptionSlot(), clang::CodeGen::EHCatchScope::getHandler(), clang::CodeGen::CodeGenModule::getIntrinsic(), clang::CodeGen::CodeGenFunction::getLLVMContext(), clang::CodeGen::EHCatchScope::getNumHandlers(), clang::CodeGen::EHCatchScope::Handler::isCatchAll(), clang::CodeGen::EHCatchScope::Handler::Type, and clang::CodeGen::CodeGenTypeCache::VoidPtrTy.

Referenced by emitCatchDispatchBlock().

getCatchallRethrowFn()

static llvm::FunctionCallee getCatchallRethrowFn ( CodeGenModule &  CGM, StringRef  Name  )

static

Definition at line 88 of file CGException.cpp.

References clang::CodeGen::CodeGenModule::CreateRuntimeFunction(), clang::CodeGen::CodeGenTypeCache::Int8PtrTy, and clang::CodeGen::CodeGenTypeCache::VoidTy.

getCatchAllValue()

static llvm::Constant * getCatchAllValue ( CodeGenFunction &  CGF )

static

Returns the value to inject into a selector to indicate the presence of a catch-all.

Definition at line 375 of file CGException.cpp.

References clang::CodeGen::CodeGenTypeCache::Int8PtrTy.

getCPersonality()

static const EHPersonality & getCPersonality ( const TargetInfo &  Target, const LangOptions &  L  )

static

Definition at line 132 of file CGException.cpp.

References clang::CodeGen::EHPersonality::GNU_C, clang::CodeGen::EHPersonality::GNU_C_SEH, clang::CodeGen::EHPersonality::GNU_C_SJLJ, clang::LangOptions::hasDWARFExceptions(), clang::LangOptions::hasSEHExceptions(), clang::LangOptions::hasSjLjExceptions(), clang::CodeGen::EHPersonality::MSVC_CxxFrameHandler3, and clang::T.

Referenced by clang::CodeGen::EHPersonality::get(), and getObjCPersonality().

getCXXPersonality()

static const EHPersonality & getCXXPersonality ( const TargetInfo &  Target, const LangOptions &  L  )

static

Definition at line 176 of file CGException.cpp.

References clang::CodeGen::EHPersonality::GNU_CPlusPlus, clang::CodeGen::EHPersonality::GNU_CPlusPlus_SEH, clang::CodeGen::EHPersonality::GNU_CPlusPlus_SJLJ, clang::CodeGen::EHPersonality::GNU_Wasm_CPlusPlus, clang::LangOptions::hasDWARFExceptions(), clang::LangOptions::hasSEHExceptions(), clang::LangOptions::hasSjLjExceptions(), clang::LangOptions::hasWasmExceptions(), clang::CodeGen::EHPersonality::MSVC_CxxFrameHandler3, clang::T, clang::CodeGen::EHPersonality::XL_CPlusPlus, and clang::CodeGen::EHPersonality::ZOS_CPlusPlus.

Referenced by clang::CodeGen::EHPersonality::get(), and getObjCXXPersonality().

getFreeExceptionFn()

static llvm::FunctionCallee getFreeExceptionFn ( CodeGenModule &  CGM )

static

Definition at line 32 of file CGException.cpp.

References clang::CodeGen::CodeGenModule::CreateRuntimeFunction(), clang::CodeGen::CodeGenTypeCache::Int8PtrTy, and clang::CodeGen::CodeGenTypeCache::VoidTy.

getObjCPersonality()

static const EHPersonality & getObjCPersonality ( const TargetInfo &  Target, const LangOptions &  L  )

static

Definition at line 146 of file CGException.cpp.

References clang::ObjCRuntime::FragileMacOSX, clang::ObjCRuntime::GCC, getCPersonality(), clang::ObjCRuntime::getKind(), clang::ObjCRuntime::getVersion(), clang::CodeGen::EHPersonality::GNU_CPlusPlus_SEH, clang::CodeGen::EHPersonality::GNU_ObjC, clang::CodeGen::EHPersonality::GNU_ObjC_SEH, clang::CodeGen::EHPersonality::GNU_ObjC_SJLJ, clang::ObjCRuntime::GNUstep, clang::CodeGen::EHPersonality::GNUstep_ObjC, clang::LangOptions::hasSEHExceptions(), clang::LangOptions::hasSjLjExceptions(), clang::ObjCRuntime::iOS, clang::ObjCRuntime::MacOSX, clang::CodeGen::EHPersonality::MSVC_CxxFrameHandler3, clang::CodeGen::EHPersonality::NeXT_ObjC, clang::LangOptions::ObjCRuntime, clang::ObjCRuntime::ObjFW, clang::T, and clang::ObjCRuntime::WatchOS.

Referenced by clang::CodeGen::EHPersonality::get(), and getObjCXXPersonality().

getObjCXXPersonality()

static const EHPersonality & getObjCXXPersonality ( const TargetInfo &  Target, const LangOptions &  L  )

static

Determines the personality function to use when both C++ and Objective-C exceptions are being caught.

Definition at line 198 of file CGException.cpp.

References clang::ObjCRuntime::FragileMacOSX, clang::ObjCRuntime::GCC, getCXXPersonality(), clang::ObjCRuntime::getKind(), getObjCPersonality(), clang::CodeGen::EHPersonality::GNU_CPlusPlus_SEH, clang::CodeGen::EHPersonality::GNU_ObjCXX, clang::ObjCRuntime::GNUstep, clang::ObjCRuntime::iOS, clang::ObjCRuntime::MacOSX, clang::CodeGen::EHPersonality::MSVC_CxxFrameHandler3, clang::LangOptions::ObjCRuntime, clang::ObjCRuntime::ObjFW, and clang::ObjCRuntime::WatchOS.

Referenced by clang::CodeGen::EHPersonality::get().

getOpaquePersonalityFn()

static llvm::Constant * getOpaquePersonalityFn ( CodeGenModule &  CGM, const EHPersonality &  Personality  )

static

Definition at line 269 of file CGException.cpp.

References getPersonalityFn().

getPersonalityFn()

static llvm::FunctionCallee getPersonalityFn ( CodeGenModule &  CGM, const EHPersonality &  Personality  )

static

Definition at line 262 of file CGException.cpp.

References clang::CodeGen::CodeGenModule::CreateRuntimeFunction(), clang::CodeGen::CodeGenTypeCache::Int32Ty, and clang::CodeGen::EHPersonality::PersonalityFn.

Referenced by getOpaquePersonalityFn().

getSEHPersonalityMSVC()

static const EHPersonality & getSEHPersonalityMSVC ( const llvm::Triple &  T )

static

Definition at line 230 of file CGException.cpp.

References clang::CodeGen::EHPersonality::MSVC_C_specific_handler, clang::CodeGen::EHPersonality::MSVC_except_handler, and clang::T.

Referenced by clang::CodeGen::EHPersonality::get().

getSehTryBeginFn()

static llvm::FunctionCallee getSehTryBeginFn ( CodeGenModule &  CGM )

static

Definition at line 41 of file CGException.cpp.

References clang::CodeGen::CodeGenModule::CreateRuntimeFunction(), and clang::CodeGen::CodeGenTypeCache::VoidTy.

getSehTryEndFn()

static llvm::FunctionCallee getSehTryEndFn ( CodeGenModule &  CGM )

static

Definition at line 47 of file CGException.cpp.

References clang::CodeGen::CodeGenModule::CreateRuntimeFunction(), and clang::CodeGen::CodeGenTypeCache::VoidTy.

getUnexpectedFn()

static llvm::FunctionCallee getUnexpectedFn ( CodeGenModule &  CGM )

static

Definition at line 53 of file CGException.cpp.

References clang::CodeGen::CodeGenModule::CreateRuntimeFunction(), clang::CodeGen::CodeGenTypeCache::Int8PtrTy, and clang::CodeGen::CodeGenTypeCache::VoidTy.

Referenced by emitFilterDispatchBlock().

isNonEHScope()

static bool isNonEHScope ( const EHScope &  S )

static

Check whether this is a non-EH scope, i.e.

a scope which doesn't affect exception handling. Currently, the only non-EH scopes are normal-only cleanup scopes.

Definition at line 761 of file CGException.cpp.

References clang::CodeGen::EHScope::Catch, clang::CodeGen::EHScope::Cleanup, clang::CodeGen::EHScope::Filter, and clang::CodeGen::EHScope::Terminate.

LandingPadHasOnlyCXXUses()

static bool LandingPadHasOnlyCXXUses ( llvm::LandingPadInst *  LPI )

static

Check whether a landingpad instruction only uses C++ features.

Definition at line 276 of file CGException.cpp.

References E.

Referenced by PersonalityHasOnlyCXXUses().

PersonalityHasOnlyCXXUses()

static bool PersonalityHasOnlyCXXUses ( llvm::Constant *  Fn )

static

Check whether a personality function could reasonably be swapped for a C++ personality function.

Definition at line 307 of file CGException.cpp.

References E, LandingPadHasOnlyCXXUses(), and PersonalityHasOnlyCXXUses().

Referenced by PersonalityHasOnlyCXXUses().