3957fd5858
This is actually required by the C++ standard in [basic.stc.dynamic.allocation]p3: If an allocation function declared with a non-throwing exception-specification fails to allocate storage, it shall return a null pointer. Any other allocation function that fails to allocate storage shall indicate failure only by throwing an exception of a type that would match a handler of type std::bad_alloc. We don't bother checking for the specific exception type, but just go off the operator new prototype. This should help with a certain class of lazy initalization false positives. <rdar://problem/12115221> llvm-svn: 166363
72 lines
2.0 KiB
C++
72 lines
2.0 KiB
C++
// RUN: %clang_cc1 -analyze -analyzer-checker=core,debug.ExprInspection -analyzer-store region -std=c++11 -fexceptions -fcxx-exceptions -verify -DEXCEPTIONS %s
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// RUN: %clang_cc1 -analyze -analyzer-checker=core,debug.ExprInspection -analyzer-store region -std=c++11 -verify %s
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void clang_analyzer_eval(bool);
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typedef __typeof__(sizeof(int)) size_t;
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extern "C" void *malloc(size_t);
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// This is the standard placement new.
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inline void* operator new(size_t, void* __p) throw()
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{
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return __p;
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}
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struct NoThrow {
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void *operator new(size_t) throw();
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};
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struct NoExcept {
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void *operator new(size_t) noexcept;
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};
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struct DefaultThrow {
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void *operator new(size_t);
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};
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struct ExplicitThrow {
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void *operator new(size_t) throw(int);
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};
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void testNew() {
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clang_analyzer_eval(new NoThrow); // expected-warning{{UNKNOWN}}
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clang_analyzer_eval(new NoExcept); // expected-warning{{UNKNOWN}}
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clang_analyzer_eval(new DefaultThrow);
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clang_analyzer_eval(new ExplicitThrow);
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#ifdef EXCEPTIONS
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// expected-warning@-3 {{TRUE}}
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// expected-warning@-3 {{TRUE}}
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#else
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// expected-warning@-6 {{UNKNOWN}}
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// expected-warning@-6 {{UNKNOWN}}
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#endif
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}
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void testNewArray() {
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clang_analyzer_eval(new NoThrow[2]);
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clang_analyzer_eval(new NoExcept[2]);
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clang_analyzer_eval(new DefaultThrow[2]);
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clang_analyzer_eval(new ExplicitThrow[2]);
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#ifdef EXCEPTIONS
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// expected-warning@-5 {{TRUE}}
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// expected-warning@-5 {{TRUE}}
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// expected-warning@-5 {{TRUE}}
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// expected-warning@-5 {{TRUE}}
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#else
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// expected-warning@-10 {{UNKNOWN}}
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// expected-warning@-10 {{UNKNOWN}}
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// expected-warning@-10 {{UNKNOWN}}
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// expected-warning@-10 {{UNKNOWN}}
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#endif
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}
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extern void *operator new[](size_t, int) noexcept;
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void testNewArrayNoThrow() {
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clang_analyzer_eval(new (1) NoThrow[2]); // expected-warning{{UNKNOWN}}
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clang_analyzer_eval(new (1) NoExcept[2]); // expected-warning{{UNKNOWN}}
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clang_analyzer_eval(new (1) DefaultThrow[2]); // expected-warning{{UNKNOWN}}
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clang_analyzer_eval(new (1) ExplicitThrow[2]); // expected-warning{{UNKNOWN}}
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}
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