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* [analyzer] Fix crash on modeling of pointer arithmeticAlexander Shaposhnikov2017-09-251-0/+6
| | | | | | | | | | | | | | | | | | | This patch fixes analyzer's crash on the newly added test case (see also https://bugs.llvm.org/show_bug.cgi?id=34374). Pointers subtraction appears to be modeled incorrectly in the following example: char* p; auto n = p - reinterpret_cast<char*>((unsigned long)1); In this case the analyzer (built without this patch) tries to create a symbolic value for the difference treating reinterpret_cast<char*>((unsigned long)1) as an integer, that is not correct. Differential revision: https://reviews.llvm.org/D38214 Test plan: make check-all llvm-svn: 314141
* [analyzer] Adjust ptr arithmetic testAlexander Shaposhnikov2017-08-281-2/+2
| | | | | | | | Replace "long" with __UINTPTR_TYPE__ to make the test added in rL311935 Windows-friendly. Caught by the buildbot llvm-clang-x86_64-expensive-checks-win. llvm-svn: 311947
* [analyzer] Fix crash in modeling arithmeticAlexander Shaposhnikov2017-08-281-0/+6
| | | | | | | | | | | | | This diff fixes modeling of arithmetic expressions where pointers are treated as integers (i.e. via C-style / reinterpret casts). For now we return UnknownVal unless the operation is a comparison. Test plan: make check-all Differential revision: https://reviews.llvm.org/D37120 llvm-svn: 311935
* [analyzer] Fix SimpleSValBuilder::simplifySValAlexander Shaposhnikov2017-08-141-0/+7
| | | | | | | | | | This diff fixes a crash (triggered assert) on the newly added test case. In the method Simplifier::VisitSymbolData we check the type of S and return Loc/NonLoc accordingly. Differential revision: https://reviews.llvm.org/D36564 llvm-svn: 310887
* Reland 4: [analyzer] NFC: Update test infrastructure to support multiple ↵Dominic Chen2017-03-031-1/+1
| | | | | | | | | | | | | | constraint managers Summary: Replace calls to %clang/%clang_cc1 with %clang_analyze_cc1 when invoking static analyzer, and perform runtime substitution to select the appropriate constraint manager, per D28952. Reviewers: xazax.hun, NoQ, zaks.anna, dcoughlin Subscribers: mgorny, rgov, mikhail.ramalho, a.sidorin, cfe-commits Differential Revision: https://reviews.llvm.org/D30373 llvm-svn: 296895
* Revert "Reland 3: [analyzer] NFC: Update test infrastructure to support ↵Dominic Chen2017-03-021-1/+1
| | | | | | | | multiple constraint managers" This reverts commit ea36f1406e1f36bf456c3f3929839b024128e468. llvm-svn: 296841
* Reland 3: [analyzer] NFC: Update test infrastructure to support multiple ↵Dominic Chen2017-03-021-1/+1
| | | | | | | | | | | | | | constraint managers Summary: Replace calls to %clang/%clang_cc1 with %clang_analyze_cc1 when invoking static analyzer, and perform runtime substitution to select the appropriate constraint manager, per D28952. Reviewers: xazax.hun, NoQ, zaks.anna, dcoughlin Subscribers: mgorny, rgov, mikhail.ramalho, a.sidorin, cfe-commits Differential Revision: https://reviews.llvm.org/D30373 llvm-svn: 296837
* Revert "Reland 2: [analyzer] NFC: Update test infrastructure to support ↵Dominic Chen2017-03-021-1/+1
| | | | | | | | multiple constraint managers" This reverts commit f93343c099fff646a2314cc7f4925833708298b1. llvm-svn: 296836
* Reland 2: [analyzer] NFC: Update test infrastructure to support multiple ↵Dominic Chen2017-03-021-1/+1
| | | | | | | | | | | | | | constraint managers Summary: Replace calls to %clang/%clang_cc1 with %clang_analyze_cc1 when invoking static analyzer, and perform runtime substitution to select the appropriate constraint manager, per D28952. Reviewers: xazax.hun, NoQ, zaks.anna, dcoughlin Subscribers: mgorny, rgov, mikhail.ramalho, a.sidorin, cfe-commits Differential Revision: https://reviews.llvm.org/D30373 llvm-svn: 296835
* Revert "Reland: [analyzer] NFC: Update test infrastructure to support ↵Dominic Chen2017-02-281-1/+1
| | | | | | | | multiple constraint managers" This reverts commit 1b28d0b10e1c8feccb971abb6ef7a18bee589830. llvm-svn: 296422
* Reland: [analyzer] NFC: Update test infrastructure to support multiple ↵Dominic Chen2017-02-281-1/+1
| | | | | | | | | | | | | | constraint managers Summary: Replace calls to %clang/%clang_cc1 with %clang_analyze_cc1 when invoking static analyzer, and perform runtime substitution to select the appropriate constraint manager, per D28952. Reviewers: xazax.hun, NoQ, zaks.anna, dcoughlin Subscribers: mgorny, rgov, mikhail.ramalho, a.sidorin, cfe-commits Differential Revision: https://reviews.llvm.org/D30373 llvm-svn: 296414
* Revert "[analyzer] NFC: Update test infrastructure to support multiple ↵Dominic Chen2017-02-271-1/+1
| | | | | | | | constraint managers" This reverts commit 8e7780b9e59ddaad1800baf533058d2c064d4787. llvm-svn: 296317
* [analyzer] NFC: Update test infrastructure to support multiple constraint ↵Dominic Chen2017-02-271-1/+1
| | | | | | | | | | | | | | managers Summary: Replace calls to %clang/%clang_cc1 with %clang_analyze_cc1 when invoking static analyzer, and perform runtime substitution to select the appropriate constraint manager, per D28952. Reviewers: xazax.hun, NoQ, zaks.anna, dcoughlin Subscribers: mgorny, rgov, mikhail.ramalho, a.sidorin, cfe-commits Differential Revision: https://reviews.llvm.org/D30373 llvm-svn: 296312
* [analyzer] Improve pointer arithmetic checker.Gabor Horvath2016-02-231-2/+80
| | | | | | | | | | | This patch is intended to improve pointer arithmetic checker. From now on it only warns when the pointer arithmetic is likely to cause an error. For example when the pointer points to a single object, or an array of derived types. Differential Revision: http://reviews.llvm.org/D14203 llvm-svn: 261632
* [analyzer] Use a more generic MemRegion.getAsOffset to evaluate bin ↵Anna Zaks2013-05-281-0/+22
operators on MemRegions In addition to enabling more code reuse, this suppresses some false positives by allowing us to compare an element region to its base. See the ptr-arith.cpp test cases for an example. llvm-svn: 182780
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