forked from OSchip/llvm-project
89 lines
3.6 KiB
C++
89 lines
3.6 KiB
C++
// RUN: %clang_analyze_cc1 -std=c++14 %s -verify \
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// RUN: -analyzer-checker=core,unix.Malloc,debug.ExprInspection \
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// RUN: -analyzer-checker=cplusplus.StringChecker \
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// RUN: -analyzer-config eagerly-assume=false \
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// RUN: -analyzer-output=text
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#include "Inputs/system-header-simulator-cxx.h"
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void clang_analyzer_eval(bool);
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void clang_analyzer_warnIfReached();
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template <typename T> void clang_analyzer_dump(T);
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void free(void *ptr);
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void irrelevant_std_string_ctors(const char *p) {
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std::string x1; // no-warning
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std::string x2(2, 'x'); // no-warning
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std::string x3(x1, /*pos=*/2); // no-warning
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std::string x4(x1, /*pos=*/2, /*count=*/2); // no-warning
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std::string x5(p, /*count=*/(size_t)2); // no-warning
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// skip std::string(const char*)
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std::string x6(x1.begin(), x1.end()); // no-warning
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std::string x7(x1); // no-warning
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std::string x8(std::move(x1)); // no-warning
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std::string x9({'a', 'b', '\0'}); // no-warning
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}
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void null_cstring_parameter(const char *p) {
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clang_analyzer_eval(p == 0); // expected-warning {{UNKNOWN}} expected-note {{UNKNOWN}}
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if (!p) {
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// expected-note@-1 2 {{Assuming 'p' is null}}
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// expected-note@-2 2 {{Taking true branch}}
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clang_analyzer_eval(p == 0); // expected-warning {{TRUE}} expected-note {{TRUE}}
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std::string x(p);
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// expected-warning@-1 {{The parameter must not be null}}
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// expected-note@-2 {{The parameter must not be null}}
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clang_analyzer_warnIfReached(); // no-warning
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}
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}
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void null_constant_parameter() {
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std::string x((char *)0);
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// expected-warning@-1 {{The parameter must not be null}}
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// expected-note@-2 {{The parameter must not be null}}
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}
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void unknown_ctor_param(const char *p) {
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// Pass 'UnknownVal' to the std::string constructor.
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clang_analyzer_dump((char *)(p == 0)); // expected-warning {{Unknown}} expected-note {{Unknown}}
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std::string x((char *)(p == 0)); // no-crash, no-warning
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}
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void ctor_notetag_on_constraining_symbol(const char *p) {
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clang_analyzer_eval(p == 0); // expected-warning {{UNKNOWN}} expected-note {{UNKNOWN}}
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std::string x(p); // expected-note {{Assuming the pointer is not null}}
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clang_analyzer_eval(p == 0); // expected-warning {{FALSE}} expected-note {{FALSE}}
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free((void *)p); // expected-note {{Memory is released}}
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free((void *)p);
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// expected-warning@-1 {{Attempt to free released memory}}
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// expected-note@-2 {{Attempt to free released memory}}
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}
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void ctor_no_notetag_symbol_already_constrained(const char *p) {
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// expected-note@+2 + {{Assuming 'p' is non-null}}
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// expected-note@+1 + {{Taking false branch}}
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if (!p)
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return;
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clang_analyzer_eval(p == 0); // expected-warning {{FALSE}} expected-note {{FALSE}}
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std::string x(p); // no-note: 'p' is already constrained to be non-null.
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clang_analyzer_eval(p == 0); // expected-warning {{FALSE}} expected-note {{FALSE}}
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free((void *)p); // expected-note {{Memory is released}}
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free((void *)p);
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// expected-warning@-1 {{Attempt to free released memory}}
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// expected-note@-2 {{Attempt to free released memory}}
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}
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void ctor_no_notetag_if_not_interesting(const char *p1, const char *p2) {
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std::string s1(p1); // expected-note {{Assuming the pointer is not null}}
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std::string s2(p2); // no-note: s2 is not interesting
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free((void *)p1); // expected-note {{Memory is released}}
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free((void *)p1);
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// expected-warning@-1 {{Attempt to free released memory}}
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// expected-note@-2 {{Attempt to free released memory}}
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}
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