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0cdc5dddca
Summary: Added a checker for non-determinism caused by iterating unordered containers like std::unordered_set containing pointer elements. Reviewers: NoQ, george.karpenkov, whisperity, Szelethus, baloghadamsoftware Reviewed By: Szelethus Subscribers: mgorny, xazax.hun, baloghadamsoftware, szepet, rnkovacs, a.sidorin, mikhail.ramalho, donat.nagy, dkrupp, jdoerfert, Charusso, cfe-commits Tags: #clang Differential Revision: https://reviews.llvm.org/D59279 llvm-svn: 361664
29 lines
947 B
C++
29 lines
947 B
C++
// RUN: %clang_analyze_cc1 %s -analyzer-output=text -verify \
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// RUN: -analyzer-checker=core,alpha.nondeterminism.PointerIteration
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#include "Inputs/system-header-simulator-cxx.h"
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template<class T>
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void f(T x);
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void PointerIteration() {
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int a = 1, b = 2;
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std::set<int> OrderedIntSet = {a, b};
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std::set<int *> OrderedPtrSet = {&a, &b};
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std::unordered_set<int> UnorderedIntSet = {a, b};
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std::unordered_set<int *> UnorderedPtrSet = {&a, &b};
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for (auto i : OrderedIntSet) // no-warning
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f(i);
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for (auto i : OrderedPtrSet) // no-warning
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f(i);
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for (auto i : UnorderedIntSet) // no-warning
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f(i);
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for (auto i : UnorderedPtrSet) // expected-warning {{Iteration of pointer-like elements can result in non-deterministic ordering}} [alpha.nondeterminism.PointerIteration]
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// expected-note@-1 {{Iteration of pointer-like elements can result in non-deterministic ordering}} [alpha.nondeterminism.PointerIteration]
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f(i);
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}
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