A stack of scopes which respond to exceptions, including cleanups and catch blocks. More...

#include "/opt/doxygen-docs/src/llvm/tools/clang/lib/CodeGen/EHScopeStack.h"

Classes
class	Cleanup
	Information for lazily generating a cleanup. More...

class	ConditionalCleanup
	ConditionalCleanup stores the saved form of its parameters, then restores them and performs the cleanup. More...

class	iterator
	A non-stable pointer into the scope stack. More...

class	stable_iterator
	A saved depth on the scope stack. More...

Public Types
enum	{ ScopeStackAlignment = 8 }

Public Member Functions
	EHScopeStack ()

	~EHScopeStack ()

template<class T , class... As>
void	pushCleanup (CleanupKind Kind, As... A)
	Push a lazily-created cleanup on the stack. More...

template<class T , class... As>
void	pushCleanupTuple (CleanupKind Kind, std::tuple< As... > A)
	Push a lazily-created cleanup on the stack. Tuple version. More...

template<class T , class... As>
T *	pushCleanupWithExtra (CleanupKind Kind, size_t N, As... A)
	Push a cleanup with non-constant storage requirements on the stack. More...

void	pushCopyOfCleanup (CleanupKind Kind, const void *Cleanup, size_t Size)

void	popCleanup ()
	Pops a cleanup scope off the stack. This is private to CGCleanup.cpp. More...

class EHCatchScope *	pushCatch (unsigned NumHandlers)
	Push a set of catch handlers on the stack. More...

void	popCatch ()
	Pops a catch scope off the stack. This is private to CGException.cpp. More...

class EHFilterScope *	pushFilter (unsigned NumFilters)
	Push an exceptions filter on the stack. More...

void	popFilter ()
	Pops an exceptions filter off the stack. More...

void	pushTerminate ()
	Push a terminate handler on the stack. More...

void	popTerminate ()
	Pops a terminate handler off the stack. More...

bool	containsOnlyLifetimeMarkers (stable_iterator Old) const

bool	empty () const
	Determines whether the exception-scopes stack is empty. More...

bool	requiresLandingPad () const

bool	hasNormalCleanups () const
	Determines whether there are any normal cleanups on the stack. More...

stable_iterator	getInnermostNormalCleanup () const
	Returns the innermost normal cleanup on the stack, or stable_end() if there are no normal cleanups. More...

stable_iterator	getInnermostActiveNormalCleanup () const

stable_iterator	getInnermostEHScope () const

iterator	begin () const
	Returns an iterator pointing to the innermost EH scope. More...

iterator	end () const
	Returns an iterator pointing to the outermost EH scope. More...

stable_iterator	stable_begin () const
	Create a stable reference to the top of the EH stack. More...

stable_iterator	stabilize (iterator it) const
	Translates an iterator into a stable_iterator. More...

iterator	find (stable_iterator save) const
	Turn a stable reference to a scope depth into a unstable pointer to the EH stack. More...

BranchFixup &	addBranchFixup ()
	Add a branch fixup to the current cleanup scope. More...

unsigned	getNumBranchFixups () const

BranchFixup &	getBranchFixup (unsigned I)

void	popNullFixups ()
	Pops lazily-removed fixups from the end of the list. More...

void	clearFixups ()
	Clears the branch-fixups list. More...

Static Public Member Functions
static stable_iterator	stable_end ()
	Create a stable reference to the bottom of the EH stack. More...

Detailed Description

A stack of scopes which respond to exceptions, including cleanups and catch blocks.

Definition at line 100 of file EHScopeStack.h.

Member Enumeration Documentation

◆ anonymous enum

anonymous enum

Enumerator
ScopeStackAlignment

Definition at line 103 of file EHScopeStack.h.

Constructor & Destructor Documentation

◆ EHScopeStack()

clang::CodeGen::EHScopeStack::EHScopeStack ( )

inline

Definition at line 267 of file EHScopeStack.h.

◆ ~EHScopeStack()

clang::CodeGen::EHScopeStack::~EHScopeStack ( )

inline

Definition at line 270 of file EHScopeStack.h.

Member Function Documentation

◆ addBranchFixup()

BranchFixup& clang::CodeGen::EHScopeStack::addBranchFixup ( )

inline

Add a branch fixup to the current cleanup scope.

Definition at line 396 of file EHScopeStack.h.

◆ begin()

EHScopeStack::iterator clang::CodeGen::EHScopeStack::begin ( ) const

inline

Returns an iterator pointing to the innermost EH scope.

Definition at line 567 of file CGCleanup.h.

Referenced by containsOnlyLifetimeMarkers(), clang::CodeGen::CodeGenFunction::FinallyInfo::exit(), popCleanup(), and popFilter().

◆ clearFixups()

void clang::CodeGen::EHScopeStack::clearFixups ( )

inline

Clears the branch-fixups list.

This should only be called by ResolveAllBranchFixups.

Definition at line 415 of file EHScopeStack.h.

◆ containsOnlyLifetimeMarkers()

bool EHScopeStack::containsOnlyLifetimeMarkers ( EHScopeStack::stable_iterator Old ) const

Definition at line 148 of file CGCleanup.cpp.

References begin(), clang::format::cleanup(), clang::CodeGen::EHCleanupScope::isLifetimeMarker(), and stabilize().

Referenced by clang::CodeGen::CodeGenFunction::FinishFunction().

◆ empty()

bool clang::CodeGen::EHScopeStack::empty ( ) const

inline

Determines whether the exception-scopes stack is empty.

Definition at line 345 of file EHScopeStack.h.

Referenced by clang::CodeGen::CodeGenFunction::FinishFunction(), popCleanup(), popFilter(), and clang::CodeGen::CodeGenFunction::SimplifyForwardingBlocks().

◆ end()

EHScopeStack::iterator clang::CodeGen::EHScopeStack::end ( ) const

inline

Returns an iterator pointing to the outermost EH scope.

Definition at line 571 of file CGCleanup.h.

◆ find()

EHScopeStack::iterator clang::CodeGen::EHScopeStack::find ( stable_iterator save ) const

inline

Turn a stable reference to a scope depth into a unstable pointer to the EH stack.

Definition at line 591 of file CGCleanup.h.

References clang::CodeGen::EHScopeStack::stable_iterator::isValid().

Referenced by getInnermostActiveNormalCleanup(), IsUsedAsEHCleanup(), IsUsedAsNormalCleanup(), popNullFixups(), requiresLandingPad(), and SetupCleanupBlockActivation().

◆ getBranchFixup()

BranchFixup& clang::CodeGen::EHScopeStack::getBranchFixup ( unsigned I )

inline

Definition at line 403 of file EHScopeStack.h.

◆ getInnermostActiveNormalCleanup()

EHScopeStack::stable_iterator EHScopeStack::getInnermostActiveNormalCleanup ( ) const

Definition at line 174 of file CGCleanup.cpp.

References clang::format::cleanup(), clang::CodeGen::EHCleanup, find(), clang::CodeGen::EHCleanupScope::getCleanupBuffer(), clang::CodeGen::EHCleanupScope::getEnclosingNormalCleanup(), getInnermostNormalCleanup(), clang::CodeGen::EHCleanupScope::getSizeForCleanupSize(), clang::CodeGen::InactiveCleanup, clang::CodeGen::EHCleanupScope::isActive(), clang::CodeGen::LifetimeMarker, clang::CodeGen::NormalCleanup, clang::CodeGen::EHCleanupScope::setLifetimeMarker(), stable_begin(), and stable_end().

◆ getInnermostEHScope()

stable_iterator clang::CodeGen::EHScopeStack::getInnermostEHScope ( ) const

inline

Definition at line 361 of file EHScopeStack.h.

Referenced by IsUsedAsEHCleanup(), pushFilter(), and requiresLandingPad().

◆ getInnermostNormalCleanup()

stable_iterator clang::CodeGen::EHScopeStack::getInnermostNormalCleanup ( ) const

inline

Returns the innermost normal cleanup on the stack, or stable_end() if there are no normal cleanups.

Definition at line 356 of file EHScopeStack.h.

Referenced by getInnermostActiveNormalCleanup(), and clang::CodeGen::CodeGenFunction::getJumpDestInCurrentScope().

◆ getNumBranchFixups()

unsigned clang::CodeGen::EHScopeStack::getNumBranchFixups ( ) const

inline

Definition at line 402 of file EHScopeStack.h.

◆ hasNormalCleanups()

bool clang::CodeGen::EHScopeStack::hasNormalCleanups ( ) const

inline

Determines whether there are any normal cleanups on the stack.

Definition at line 350 of file EHScopeStack.h.

Referenced by clang::CodeGen::CodeGenFunction::EmitLabel(), popCleanup(), and popNullFixups().

◆ popCatch()

void clang::CodeGen::EHScopeStack::popCatch ( )

inline

Pops a catch scope off the stack. This is private to CGException.cpp.

Definition at line 575 of file CGCleanup.h.

References clang::CodeGen::EHScope::getEnclosingEHScope(), and clang::CodeGen::EHCatchScope::getNumHandlers().

◆ popCleanup()

void EHScopeStack::popCleanup ( )

Pops a cleanup scope off the stack. This is private to CGCleanup.cpp.

Definition at line 209 of file CGCleanup.cpp.

References begin(), clang::CodeGen::EHCleanupScope::Destroy(), empty(), clang::CodeGen::EHCleanupScope::getAllocatedSize(), clang::CodeGen::EHScope::getEnclosingEHScope(), clang::CodeGen::EHCleanupScope::getEnclosingNormalCleanup(), hasNormalCleanups(), and popNullFixups().

◆ popFilter()

void EHScopeStack::popFilter ( )

Pops an exceptions filter off the stack.

Definition at line 242 of file CGCleanup.cpp.

References begin(), empty(), clang::CodeGen::EHScope::getEnclosingEHScope(), clang::CodeGen::EHFilterScope::getNumFilters(), and clang::CodeGen::EHFilterScope::getSizeForNumFilters().

◆ popNullFixups()

void EHScopeStack::popNullFixups ( )

Pops lazily-removed fixups from the end of the list.

Remove any 'null' fixups on the stack.

This should only be called by procedures which have just popped a cleanup or resolved one or more fixups.

However, we can't pop more fixups than the fixup depth on the innermost normal cleanup, or else fixups that we try to add to that cleanup will end up in the wrong place. We could try to shrink fixup depths, but that's actually a lot of work for little benefit.

Definition at line 270 of file CGCleanup.cpp.

References find(), and hasNormalCleanups().

Referenced by popCleanup().

◆ popTerminate()

void clang::CodeGen::EHScopeStack::popTerminate ( )

inline

Pops a terminate handler off the stack.

Definition at line 583 of file CGCleanup.h.

References clang::CodeGen::EHScope::getEnclosingEHScope().

Referenced by InitCatchParam(), and clang::CodeGen::ReductionCodeGen::usesReductionInitializer().

◆ pushCatch()

EHCatchScope * EHScopeStack::pushCatch ( unsigned NumHandlers )

Push a set of catch handlers on the stack.

The catch is uninitialized and will need to have the given number of handlers set on it.

Definition at line 251 of file CGCleanup.cpp.

References clang::CodeGen::EHCatchScope::getSizeForNumHandlers(), and stable_begin().

Referenced by clang::CodeGen::CodeGenFunction::FinallyInfo::enter().

◆ pushCleanup()

template<class T , class... As>

void clang::CodeGen::EHScopeStack::pushCleanup	(	CleanupKind	Kind,
		As...	A
	)

inline

Push a lazily-created cleanup on the stack.

Definition at line 273 of file EHScopeStack.h.

◆ pushCleanupTuple()

template<class T , class... As>

void clang::CodeGen::EHScopeStack::pushCleanupTuple	(	CleanupKind	Kind,
		std::tuple< As... >	A
	)

inline

Push a lazily-created cleanup on the stack. Tuple version.

Definition at line 283 of file EHScopeStack.h.

Referenced by clang::CodeGen::CodeGenFunction::pushFullExprCleanup().

◆ pushCleanupWithExtra()

template<class T , class... As>

T* clang::CodeGen::EHScopeStack::pushCleanupWithExtra	(	CleanupKind	Kind,
		size_t	N,
		As...	A
	)

inline

Push a cleanup with non-constant storage requirements on the stack.

The cleanup type must provide an additional static method: static size_t getExtraSize(size_t); The argument to this method will be the value N, which will also be passed as the first argument to the constructor.

The data stored in the extra storage must obey the same restrictions as normal cleanup member data.

The pointer returned from this method is valid until the cleanup stack is modified.

Definition at line 305 of file EHScopeStack.h.

◆ pushCopyOfCleanup()

void clang::CodeGen::EHScopeStack::pushCopyOfCleanup	(	CleanupKind	Kind,
		const void *	Cleanup,
		size_t	Size
	)

inline

Definition at line 312 of file EHScopeStack.h.

References memcpy().

◆ pushFilter()

EHFilterScope * EHScopeStack::pushFilter ( unsigned NumFilters )

Push an exceptions filter on the stack.

Definition at line 234 of file CGCleanup.cpp.

References getInnermostEHScope(), clang::CodeGen::EHFilterScope::getSizeForNumFilters(), stable_begin(), and stable_end().

◆ pushTerminate()

void EHScopeStack::pushTerminate ( )

Push a terminate handler on the stack.

Definition at line 259 of file CGCleanup.cpp.

References clang::CodeGen::EHTerminateScope::getSize(), and stable_begin().

Referenced by InitCatchParam(), and clang::CodeGen::ReductionCodeGen::usesReductionInitializer().

◆ requiresLandingPad()

bool EHScopeStack::requiresLandingPad ( ) const

Definition at line 159 of file CGCleanup.cpp.

References clang::format::cleanup(), find(), getInnermostEHScope(), and stable_end().

Referenced by clang::CodeGen::CodeGenFunction::getInvokeDest().

◆ stabilize()

EHScopeStack::stable_iterator clang::CodeGen::EHScopeStack::stabilize ( iterator it ) const

inline

Translates an iterator into a stable_iterator.

Definition at line 598 of file CGCleanup.h.

Referenced by containsOnlyLifetimeMarkers().

◆ stable_begin()

stable_iterator clang::CodeGen::EHScopeStack::stable_begin ( ) const

inline

Create a stable reference to the top of the EH stack.

The returned reference is valid until that scope is popped off the stack.

Definition at line 379 of file EHScopeStack.h.

Referenced by clang::CodeGen::CodeGenFunction::EmitLabel(), clang::CodeGen::CodeGenFunction::EmitParmDecl(), enterBlockScope(), clang::CodeGen::CodeGenFunction::FinishFunction(), getInnermostActiveNormalCleanup(), isTrivialFiller(), pushCatch(), pushFilter(), pushTerminate(), clang::CodeGen::CodeGenFunction::RunCleanupsScope::requiresCleanups(), clang::CodeGen::CodeGenFunction::RunCleanupsScope::RunCleanupsScope(), and clang::CodeGen::CodeGenFunction::StartFunction().

◆ stable_end()

static stable_iterator clang::CodeGen::EHScopeStack::stable_end ( )

inlinestatic

Create a stable reference to the bottom of the EH stack.

Definition at line 384 of file EHScopeStack.h.

Referenced by getInnermostActiveNormalCleanup(), pushFilter(), requiresLandingPad(), and clang::CodeGen::CodeGenFunction::LexicalScope::rescopeLabels().

The documentation for this class was generated from the following files:

lib/CodeGen/EHScopeStack.h
lib/CodeGen/CGCleanup.cpp
lib/CodeGen/CGCleanup.h

Classes

Public Types

Public Member Functions

Static Public Member Functions

Detailed Description

Member Enumeration Documentation

◆ anonymous enum

Constructor & Destructor Documentation

◆ EHScopeStack()

◆ ~EHScopeStack()

Member Function Documentation

◆ addBranchFixup()

◆ begin()

◆ clearFixups()

◆ containsOnlyLifetimeMarkers()

◆ empty()

◆ end()

◆ find()

◆ getBranchFixup()

◆ getInnermostActiveNormalCleanup()

◆ getInnermostEHScope()

◆ getInnermostNormalCleanup()

◆ getNumBranchFixups()

◆ hasNormalCleanups()

◆ popCatch()

◆ popCleanup()

◆ popFilter()

◆ popNullFixups()

◆ popTerminate()

◆ pushCatch()

◆ pushCleanup()

◆ pushCleanupTuple()

◆ pushCleanupWithExtra()

◆ pushCopyOfCleanup()

◆ pushFilter()

◆ pushTerminate()

◆ requiresLandingPad()

◆ stabilize()

◆ stable_begin()

◆ stable_end()