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https://github.com/Gericom/teak-llvm.git
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391b19c78a
Interestingly, this many year old (when I last looked I remember 2010ish) checker was committed without any tests, so I thought I'd implement them, but I was shocked to see how I barely managed to get it working. The code is severely outdated, I'm not even sure it has ever been used, so I'd propose to move it back into alpha, and possibly even remove it. Differential Revision: https://reviews.llvm.org/D53856 llvm-svn: 345990
398 lines
16 KiB
C++
398 lines
16 KiB
C++
// RUN: %clang_analyze_cc1 -analyzer-checker=cplusplus.InnerPointer \
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// RUN: %s -analyzer-output=text -verify
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#include "Inputs/system-header-simulator-cxx.h"
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namespace std {
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template <typename T>
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void func_ref(T &a);
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template <typename T>
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void func_const_ref(const T &a);
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template <typename T>
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void func_value(T a);
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string my_string = "default";
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void default_arg(int a = 42, string &b = my_string);
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} // end namespace std
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void consume(const char *) {}
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void consume(const wchar_t *) {}
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void consume(const char16_t *) {}
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void consume(const char32_t *) {}
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//=--------------------------------------=//
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// `std::string` member functions //
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//=--------------------------------------=//
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void deref_after_scope_char(bool cond) {
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const char *c, *d;
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{
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std::string s;
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c = s.c_str(); // expected-note {{Pointer to inner buffer of 'std::string' obtained here}}
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d = s.data(); // expected-note {{Pointer to inner buffer of 'std::string' obtained here}}
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} // expected-note {{Inner buffer of 'std::string' deallocated by call to destructor}}
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// expected-note@-1 {{Inner buffer of 'std::string' deallocated by call to destructor}}
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std::string s;
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const char *c2 = s.c_str();
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if (cond) {
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// expected-note@-1 {{Assuming 'cond' is not equal to 0}}
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// expected-note@-2 {{Taking true branch}}
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// expected-note@-3 {{Assuming 'cond' is 0}}
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// expected-note@-4 {{Taking false branch}}
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consume(c); // expected-warning {{Inner pointer of container used after re/deallocation}}
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// expected-note@-1 {{Inner pointer of container used after re/deallocation}}
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} else {
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consume(d); // expected-warning {{Inner pointer of container used after re/deallocation}}
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// expected-note@-1 {{Inner pointer of container used after re/deallocation}}
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}
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}
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void deref_after_scope_char_data_non_const() {
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char *c;
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{
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std::string s;
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c = s.data(); // expected-note {{Pointer to inner buffer of 'std::string' obtained here}}
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} // expected-note {{Inner buffer of 'std::string' deallocated by call to destructor}}
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std::string s;
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char *c2 = s.data();
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consume(c); // expected-warning {{Inner pointer of container used after re/deallocation}}
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// expected-note@-1 {{Inner pointer of container used after re/deallocation}}
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}
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void deref_after_scope_wchar_t(bool cond) {
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const wchar_t *c, *d;
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{
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std::wstring s;
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c = s.c_str(); // expected-note {{Pointer to inner buffer of 'std::wstring' obtained here}}
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d = s.data(); // expected-note {{Pointer to inner buffer of 'std::wstring' obtained here}}
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} // expected-note {{Inner buffer of 'std::wstring' deallocated by call to destructor}}
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// expected-note@-1 {{Inner buffer of 'std::wstring' deallocated by call to destructor}}
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std::wstring s;
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const wchar_t *c2 = s.c_str();
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if (cond) {
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// expected-note@-1 {{Assuming 'cond' is not equal to 0}}
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// expected-note@-2 {{Taking true branch}}
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// expected-note@-3 {{Assuming 'cond' is 0}}
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// expected-note@-4 {{Taking false branch}}
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consume(c); // expected-warning {{Inner pointer of container used after re/deallocation}}
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// expected-note@-1 {{Inner pointer of container used after re/deallocation}}
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} else {
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consume(d); // expected-warning {{Inner pointer of container used after re/deallocation}}
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// expected-note@-1 {{Inner pointer of container used after re/deallocation}}
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}
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}
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void deref_after_scope_char16_t_cstr() {
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const char16_t *c16;
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{
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std::u16string s16;
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c16 = s16.c_str(); // expected-note {{Pointer to inner buffer of 'std::u16string' obtained here}}
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} // expected-note {{Inner buffer of 'std::u16string' deallocated by call to destructor}}
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std::u16string s16;
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const char16_t *c16_2 = s16.c_str();
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consume(c16); // expected-warning {{Inner pointer of container used after re/deallocation}}
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// expected-note@-1 {{Inner pointer of container used after re/deallocation}}
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}
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void deref_after_scope_char32_t_data() {
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const char32_t *c32;
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{
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std::u32string s32;
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c32 = s32.data(); // expected-note {{Pointer to inner buffer of 'std::u32string' obtained here}}
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} // expected-note {{Inner buffer of 'std::u32string' deallocated by call to destructor}}
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std::u32string s32;
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const char32_t *c32_2 = s32.data();
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consume(c32); // expected-warning {{Inner pointer of container used after re/deallocation}}
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// expected-note@-1 {{Inner pointer of container used after re/deallocation}}
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}
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void multiple_symbols(bool cond) {
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const char *c1, *d1;
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{
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std::string s1;
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c1 = s1.c_str(); // expected-note {{Pointer to inner buffer of 'std::string' obtained here}}
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d1 = s1.data(); // expected-note {{Pointer to inner buffer of 'std::string' obtained here}}
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const char *local = s1.c_str();
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consume(local); // no-warning
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} // expected-note {{Inner buffer of 'std::string' deallocated by call to destructor}}
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// expected-note@-1 {{Inner buffer of 'std::string' deallocated by call to destructor}}
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std::string s2;
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const char *c2 = s2.c_str();
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if (cond) {
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// expected-note@-1 {{Assuming 'cond' is not equal to 0}}
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// expected-note@-2 {{Taking true branch}}
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// expected-note@-3 {{Assuming 'cond' is 0}}
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// expected-note@-4 {{Taking false branch}}
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consume(c1); // expected-warning {{Inner pointer of container used after re/deallocation}}
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// expected-note@-1 {{Inner pointer of container used after re/deallocation}}
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} else {
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consume(d1); // expected-warning {{Inner pointer of container used after re/deallocation}}
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} // expected-note@-1 {{Inner pointer of container used after re/deallocation}}
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}
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void deref_after_scope_ok(bool cond) {
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const char *c, *d;
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std::string s;
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{
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c = s.c_str();
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d = s.data();
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}
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if (cond)
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consume(c); // no-warning
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else
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consume(d); // no-warning
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}
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void deref_after_equals() {
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const char *c;
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std::string s = "hello";
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c = s.c_str(); // expected-note {{Pointer to inner buffer of 'std::string' obtained here}}
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s = "world"; // expected-note {{Inner buffer of 'std::string' reallocated by call to 'operator='}}
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consume(c); // expected-warning {{Inner pointer of container used after re/deallocation}}
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// expected-note@-1 {{Inner pointer of container used after re/deallocation}}
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}
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void deref_after_plus_equals() {
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const char *c;
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std::string s = "hello";
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c = s.data(); // expected-note {{Pointer to inner buffer of 'std::string' obtained here}}
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s += " world"; // expected-note {{Inner buffer of 'std::string' reallocated by call to 'operator+='}}
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consume(c); // expected-warning {{Inner pointer of container used after re/deallocation}}
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// expected-note@-1 {{Inner pointer of container used after re/deallocation}}
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}
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void deref_after_clear() {
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const char *c;
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std::string s;
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c = s.c_str(); // expected-note {{Pointer to inner buffer of 'std::string' obtained here}}
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s.clear(); // expected-note {{Inner buffer of 'std::string' reallocated by call to 'clear'}}
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consume(c); // expected-warning {{Inner pointer of container used after re/deallocation}}
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// expected-note@-1 {{Inner pointer of container used after re/deallocation}}
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}
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void deref_after_append() {
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const char *c;
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std::string s = "hello";
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c = s.c_str(); // expected-note {{Pointer to inner buffer of 'std::string' obtained here}}
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s.append(2, 'x'); // expected-note {{Inner buffer of 'std::string' reallocated by call to 'append'}}
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consume(c); // expected-warning {{Inner pointer of container used after re/deallocation}}
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// expected-note@-1 {{Inner pointer of container used after re/deallocation}}
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}
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void deref_after_assign() {
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const char *c;
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std::string s;
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c = s.data(); // expected-note {{Pointer to inner buffer of 'std::string' obtained here}}
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s.assign(4, 'a'); // expected-note {{Inner buffer of 'std::string' reallocated by call to 'assign'}}
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consume(c); // expected-warning {{Inner pointer of container used after re/deallocation}}
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// expected-note@-1 {{Inner pointer of container used after re/deallocation}}
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}
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void deref_after_erase() {
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const char *c;
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std::string s = "hello";
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c = s.c_str(); // expected-note {{Pointer to inner buffer of 'std::string' obtained here}}
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s.erase(0, 2); // expected-note {{Inner buffer of 'std::string' reallocated by call to 'erase'}}
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consume(c); // expected-warning {{Inner pointer of container used after re/deallocation}}
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// expected-note@-1 {{Inner pointer of container used after re/deallocation}}
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}
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void deref_after_insert() {
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const char *c;
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std::string s = "ello";
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c = s.c_str(); // expected-note {{Pointer to inner buffer of 'std::string' obtained here}}
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s.insert(0, 1, 'h'); // expected-note {{Inner buffer of 'std::string' reallocated by call to 'insert'}}
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consume(c); // expected-warning {{Inner pointer of container used after re/deallocation}}
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// expected-note@-1 {{Inner pointer of container used after re/deallocation}}
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}
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void deref_after_replace() {
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const char *c;
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std::string s = "hello world";
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c = s.c_str(); // expected-note {{Pointer to inner buffer of 'std::string' obtained here}}
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s.replace(6, 5, "string"); // expected-note {{Inner buffer of 'std::string' reallocated by call to 'replace'}}
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consume(c); // expected-warning {{Inner pointer of container used after re/deallocation}}
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// expected-note@-1 {{Inner pointer of container used after re/deallocation}}
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}
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void deref_after_pop_back() {
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const char *c;
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std::string s;
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c = s.c_str(); // expected-note {{Pointer to inner buffer of 'std::string' obtained here}}
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s.pop_back(); // expected-note {{Inner buffer of 'std::string' reallocated by call to 'pop_back'}}
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consume(c); // expected-warning {{Inner pointer of container used after re/deallocation}}
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// expected-note@-1 {{Inner pointer of container used after re/deallocation}}
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}
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void deref_after_push_back() {
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const char *c;
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std::string s;
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c = s.data(); // expected-note {{Pointer to inner buffer of 'std::string' obtained here}}
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s.push_back('c'); // expected-note {{Inner buffer of 'std::string' reallocated by call to 'push_back'}}
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consume(c); // expected-warning {{Inner pointer of container used after re/deallocation}}
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// expected-note@-1 {{Inner pointer of container used after re/deallocation}}
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}
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void deref_after_reserve() {
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const char *c;
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std::string s;
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c = s.c_str(); // expected-note {{Pointer to inner buffer of 'std::string' obtained here}}
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s.reserve(5); // expected-note {{Inner buffer of 'std::string' reallocated by call to 'reserve'}}
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consume(c); // expected-warning {{Inner pointer of container used after re/deallocation}}
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// expected-note@-1 {{Inner pointer of container used after re/deallocation}}
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}
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void deref_after_resize() {
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const char *c;
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std::string s;
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c = s.data(); // expected-note {{Pointer to inner buffer of 'std::string' obtained here}}
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s.resize(5); // expected-note {{Inner buffer of 'std::string' reallocated by call to 'resize'}}
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consume(c); // expected-warning {{Inner pointer of container used after re/deallocation}}
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// expected-note@-1 {{Inner pointer of container used after re/deallocation}}
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}
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void deref_after_shrink_to_fit() {
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const char *c;
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std::string s;
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c = s.data(); // expected-note {{Pointer to inner buffer of 'std::string' obtained here}}
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s.shrink_to_fit(); // expected-note {{Inner buffer of 'std::string' reallocated by call to 'shrink_to_fit'}}
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consume(c); // expected-warning {{Inner pointer of container used after re/deallocation}}
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// expected-note@-1 {{Inner pointer of container used after re/deallocation}}
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}
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void deref_after_swap() {
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const char *c;
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std::string s1, s2;
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c = s1.data(); // expected-note {{Pointer to inner buffer of 'std::string' obtained here}}
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s1.swap(s2); // expected-note {{Inner buffer of 'std::string' reallocated by call to 'swap'}}
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consume(c); // expected-warning {{Inner pointer of container used after re/deallocation}}
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// expected-note@-1 {{Inner pointer of container used after re/deallocation}}
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}
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struct S {
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std::string s;
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const char *name() {
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return s.c_str(); // expected-note {{Pointer to inner buffer of 'std::string' obtained here}}
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// expected-note@-1 {{Pointer to inner buffer of 'std::string' obtained here}}
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}
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void clear() {
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s.clear(); // expected-note {{Inner buffer of 'std::string' reallocated by call to 'clear'}}
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}
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~S() {} // expected-note {{Inner buffer of 'std::string' deallocated by call to destructor}}
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};
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void cleared_through_method() {
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S x;
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const char *c = x.name(); // expected-note {{Calling 'S::name'}}
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// expected-note@-1 {{Returning from 'S::name'}}
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x.clear(); // expected-note {{Calling 'S::clear'}}
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// expected-note@-1 {{Returning; inner buffer was reallocated}}
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consume(c); // expected-warning {{Inner pointer of container used after re/deallocation}}
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// expected-note@-1 {{Inner pointer of container used after re/deallocation}}
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}
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void destroyed_through_method() {
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S y;
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const char *c = y.name(); // expected-note {{Calling 'S::name'}}
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// expected-note@-1 {{Returning from 'S::name'}}
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y.~S(); // expected-note {{Calling '~S'}}
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// expected-note@-1 {{Returning; inner buffer was deallocated}}
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consume(c); // expected-warning {{Inner pointer of container used after re/deallocation}}
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// expected-note@-1 {{Inner pointer of container used after re/deallocation}}
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}
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//=---------------------------=//
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// Other STL functions //
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//=---------------------------=//
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void STL_func_ref() {
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const char *c;
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std::string s;
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c = s.c_str(); // expected-note {{Pointer to inner buffer of 'std::string' obtained here}}
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std::func_ref(s); // expected-note {{Inner buffer of 'std::string' reallocated by call to 'func_ref'}}
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consume(c); // expected-warning {{Inner pointer of container used after re/deallocation}}
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// expected-note@-1 {{Inner pointer of container used after re/deallocation}}
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}
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void STL_func_const_ref() {
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const char *c;
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std::string s;
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c = s.c_str();
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std::func_const_ref(s);
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consume(c); // no-warning
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}
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void STL_func_value() {
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const char *c;
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std::string s;
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c = s.c_str();
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std::func_value(s);
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consume(c); // no-warning
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}
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void func_ptr_known() {
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const char *c;
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std::string s;
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void (*func_ptr)(std::string &) = std::func_ref<std::string>;
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c = s.c_str(); // expected-note {{Pointer to inner buffer of 'std::string' obtained here}}
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func_ptr(s); // expected-note {{Inner buffer of 'std::string' reallocated by call to 'func_ref'}}
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consume(c); // expected-warning {{Inner pointer of container used after re/deallocation}}
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// expected-note@-1 {{Inner pointer of container used after re/deallocation}}
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}
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void func_ptr_unknown(void (*func_ptr)(std::string &)) {
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const char *c;
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std::string s;
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c = s.c_str();
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func_ptr(s);
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consume(c); // no-warning
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}
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void func_default_arg() {
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const char *c;
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std::string s;
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c = s.c_str(); // expected-note {{Pointer to inner buffer of 'std::string' obtained here}}
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default_arg(3, s); // expected-note {{Inner buffer of 'std::string' reallocated by call to 'default_arg'}}
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consume(c); // expected-warning {{Inner pointer of container used after re/deallocation}}
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// expected-note@-1 {{Inner pointer of container used after re/deallocation}}
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}
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struct T {
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std::string to_string() { return s; }
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private:
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std::string s;
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};
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const char *escape_via_return_temp() {
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T x;
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return x.to_string().c_str(); // expected-note {{Pointer to inner buffer of 'std::string' obtained here}}
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// expected-note@-1 {{Inner buffer of 'std::string' deallocated by call to destructor}}
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// expected-warning@-2 {{Inner pointer of container used after re/deallocation}}
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// expected-note@-3 {{Inner pointer of container used after re/deallocation}}
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}
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const char *escape_via_return_local() {
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std::string s;
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return s.c_str(); // expected-note {{Pointer to inner buffer of 'std::string' obtained here}}
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// expected-note@-1 {{Inner buffer of 'std::string' deallocated by call to destructor}}
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// expected-warning@-2 {{Inner pointer of container used after re/deallocation}}
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// expected-note@-3 {{Inner pointer of container used after re/deallocation}}
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}
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char *c();
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class A {};
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void no_CXXRecordDecl() {
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A a, *b;
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*(void **)&b = c() + 1;
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*b = a; // no-crash
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}
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void checkReference(std::string &s) {
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const char *c = s.c_str();
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}
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