7740c6d643
Summary: It allows discriminating between stack frames of the same call that is called multiple times in a loop. Thanks to Artem Dergachev for the great idea! Reviewed By: NoQ Tags: #clang Differential Revision: https://reviews.llvm.org/D65587 llvm-svn: 367608
38 lines
990 B
C++
38 lines
990 B
C++
// RUN: %clang_analyze_cc1 -analyzer-checker=core,cplusplus.NewDelete -verify %s
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// expected-no-diagnostics:
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// From now the profile of the 'StackFrameContext' also contains the
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// 'NodeBuilderContext::blockCount()'. With this addition we can distinguish
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// between the 'StackArgumentsSpaceRegion' of the 'P' arguments being different
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// on every iteration.
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typedef __INTPTR_TYPE__ intptr_t;
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template <typename PointerTy>
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struct SmarterPointer {
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PointerTy getFromVoidPointer(void *P) const {
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return static_cast<PointerTy>(P);
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}
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PointerTy getPointer() const {
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return getFromVoidPointer(reinterpret_cast<void *>(Value));
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}
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intptr_t Value = 13;
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};
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struct Node {
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SmarterPointer<Node *> Pred;
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};
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void test(Node *N) {
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while (N) {
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SmarterPointer<Node *> Next = N->Pred;
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delete N;
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N = Next.getPointer();
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// no-warning: 'Use of memory after it is freed' was here as the same
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// 'StackArgumentsSpaceRegion' purged out twice as 'P'.
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}
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}
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