clang
3.9.0
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A class responsible for cleaning up unused symbols. More...
#include <SymbolManager.h>
Public Types | |
typedef SymbolSetTy::const_iterator | dead_iterator |
typedef RegionSetTy::const_iterator | region_iterator |
Public Member Functions | |
SymbolReaper (const StackFrameContext *Ctx, const Stmt *s, SymbolManager &symmgr, StoreManager &storeMgr) | |
Construct a reaper object, which removes everything which is not live before we execute statement s in the given location context. More... | |
const LocationContext * | getLocationContext () const |
bool | isLive (SymbolRef sym) |
bool | isLiveRegion (const MemRegion *region) |
bool | isLive (const Stmt *ExprVal, const LocationContext *LCtx) const |
bool | isLive (const VarRegion *VR, bool includeStoreBindings=false) const |
void | markLive (SymbolRef sym) |
Unconditionally marks a symbol as live. More... | |
void | markInUse (SymbolRef sym) |
Marks a symbol as important to a checker. More... | |
bool | maybeDead (SymbolRef sym) |
If a symbol is known to be live, marks the symbol as live. More... | |
dead_iterator | dead_begin () const |
dead_iterator | dead_end () const |
bool | hasDeadSymbols () const |
region_iterator | region_begin () const |
region_iterator | region_end () const |
bool | isDead (SymbolRef sym) const |
Returns whether or not a symbol has been confirmed dead. More... | |
void | markLive (const MemRegion *region) |
void | markElementIndicesLive (const MemRegion *region) |
void | setReapedStore (StoreRef st) |
Set to the value of the symbolic store after StoreManager::removeDeadBindings has been called. More... | |
A class responsible for cleaning up unused symbols.
Definition at line 475 of file SymbolManager.h.
typedef SymbolSetTy::const_iterator clang::ento::SymbolReaper::dead_iterator |
Definition at line 539 of file SymbolManager.h.
typedef RegionSetTy::const_iterator clang::ento::SymbolReaper::region_iterator |
Definition at line 547 of file SymbolManager.h.
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Construct a reaper object, which removes everything which is not live before we execute statement s in the given location context.
If the statement is NULL, everything is this and parent contexts is considered live. If the stack frame context is NULL, everything on stack is considered dead.
Definition at line 505 of file SymbolManager.h.
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Definition at line 540 of file SymbolManager.h.
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Definition at line 541 of file SymbolManager.h.
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Definition at line 510 of file SymbolManager.h.
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Definition at line 543 of file SymbolManager.h.
Referenced by clang::ento::mpi::MPIChecker::checkMissingWaits(), and clang::ento::ExprEngine::removeDead().
Returns whether or not a symbol has been confirmed dead.
This should only be called once all marking of dead symbols has completed. (For checkers, this means only in the evalDeadSymbols callback.)
Definition at line 555 of file SymbolManager.h.
Definition at line 452 of file SymbolManager.cpp.
References clang::ento::SymExpr::getKind().
Referenced by clang::ento::EnvironmentManager::removeDeadBindings().
bool SymbolReaper::isLive | ( | const Stmt * | ExprVal, |
const LocationContext * | LCtx | ||
) | const |
Definition at line 501 of file SymbolManager.cpp.
Definition at line 520 of file SymbolManager.cpp.
References clang::LocationContext::getCurrentStackFrame(), clang::ento::VarRegion::getDecl(), clang::ento::VarRegion::getStackFrame(), clang::LiveVariables::isLive(), and clang::LocationContext::isParentOf().
Definition at line 421 of file SymbolManager.cpp.
References clang::ento::MemRegion::getBaseRegion().
Referenced by clang::ento::mpi::MPIChecker::checkMissingWaits().
void SymbolReaper::markElementIndicesLive | ( | const MemRegion * | region | ) |
Definition at line 397 of file SymbolManager.cpp.
References clang::ento::SVal::symbol_begin(), and clang::ento::SVal::symbol_end().
void SymbolReaper::markInUse | ( | SymbolRef | sym | ) |
Marks a symbol as important to a checker.
For metadata symbols, this will keep the symbol alive as long as its associated region is also live. For other symbols, this has no effect; checkers are not permitted to influence the life of other symbols. This should be used before any symbol marking has occurred, i.e. in the MarkLiveSymbols callback.
Definition at line 408 of file SymbolManager.cpp.
void SymbolReaper::markLive | ( | SymbolRef | sym | ) |
Unconditionally marks a symbol as live.
This should never be used by checkers, only by the state infrastructure such as the store and environment. Checkers should instead use metadata symbols and markInUse.
Definition at line 386 of file SymbolManager.cpp.
void SymbolReaper::markLive | ( | const MemRegion * | region | ) |
Definition at line 392 of file SymbolManager.cpp.
If a symbol is known to be live, marks the symbol as live.
Otherwise, if the symbol cannot be proven live, it is marked as dead. Returns true if the symbol is dead, false if live.
Definition at line 413 of file SymbolManager.cpp.
Referenced by clang::ento::EnvironmentManager::removeDeadBindings().
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Definition at line 548 of file SymbolManager.h.
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Definition at line 549 of file SymbolManager.h.
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Set to the value of the symbolic store after StoreManager::removeDeadBindings has been called.
Definition at line 564 of file SymbolManager.h.
Referenced by clang::ento::ProgramStateManager::removeDeadBindings().