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68983321cc
Summary: Integer Set Library using retain-count based allocation which is not modeled in MallocChecker. Reviewed By: NoQ Tags: #clang Differential Revision: https://reviews.llvm.org/D64680 llvm-svn: 366391
38 lines
899 B
C++
38 lines
899 B
C++
// RUN: %clang_analyze_cc1 \
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// RUN: -analyzer-checker=core,unix.Malloc \
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// RUN: -verify %s
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// expected-no-diagnostics: We do not model Integer Set Library's retain-count
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// based allocation. If any of the parameters has an
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// '__isl_' prefixed macro definition we escape every
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// of them when we are about to 'free()' something.
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#define __isl_take
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#define __isl_keep
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struct Object { int Ref; };
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void free(void *);
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Object *copyObj(__isl_keep Object *O) {
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O->Ref++;
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return O;
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}
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void freeObj(__isl_take Object *O) {
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if (--O->Ref > 0)
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return;
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free(O); // Here we notice that the parameter contains '__isl_', escape it.
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}
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void useAfterFree(__isl_take Object *A) {
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if (!A)
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return;
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Object *B = copyObj(A);
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freeObj(B);
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A->Ref = 13;
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// no-warning: 'Use of memory after it is freed' was here.
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}
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