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https://github.com/Gericom/teak-llvm.git
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fce1b03ee7
Summary: -fno-exceptions does not implicitly attach a nothrow specifier to every operator new. Even in this mode, non-nothrow new must not return a null pointer. Failure to allocate memory can be signalled by other means, or just by killing the program. This behaviour is consistent with the compiler - even with -fno-exceptions, the generated code never tests for null (and would segfault if the opeator actually happened to return null). Reviewers: jordan_rose CC: cfe-commits Differential Revision: http://llvm-reviews.chandlerc.com/D1528 llvm-svn: 189452
54 lines
1.7 KiB
C++
54 lines
1.7 KiB
C++
// RUN: %clang_cc1 -analyze -analyzer-checker=core,debug.ExprInspection -analyzer-store region -std=c++11 -fexceptions -fcxx-exceptions -verify %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); // expected-warning{{TRUE}}
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clang_analyzer_eval(new ExplicitThrow); // expected-warning{{TRUE}}
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}
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void testNewArray() {
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clang_analyzer_eval(new NoThrow[2]); // expected-warning{{TRUE}}
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clang_analyzer_eval(new NoExcept[2]); // expected-warning{{TRUE}}
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clang_analyzer_eval(new DefaultThrow[2]); // expected-warning{{TRUE}}
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clang_analyzer_eval(new ExplicitThrow[2]); // expected-warning{{TRUE}}
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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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