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// RUN: %clang_analyze_cc1 -std=c++20 \
// RUN: -analyzer-checker=core,unix,cplusplus,debug.ExprInspection \
// RUN: -triple x86_64-unknown-linux-gnu \
// RUN: -verify %s
#include "Inputs/system-header-simulator-cxx.h"
typedef __SIZE_TYPE__ size_t;
void *malloc(size_t);
void *alloca(size_t);
void *realloc(void *ptr, size_t size);
void *calloc(size_t number, size_t size);
void free(void *);
struct S {
int f;
};
void clang_analyzer_dump(int);
void clang_analyzer_dump(const void *);
void clang_analyzer_dumpExtent(int);
void clang_analyzer_dumpExtent(const void *);
void clang_analyzer_dumpElementCount(int);
void clang_analyzer_dumpElementCount(const void *);
int clang_analyzer_getExtent(void *);
void clang_analyzer_eval(bool);
void var_simple_ref() {
int a = 13;
clang_analyzer_dump(&a); // expected-warning {{a}}
clang_analyzer_dumpExtent(&a); // expected-warning {{4 S64b}}
clang_analyzer_dumpElementCount(&a); // expected-warning {{1 S64b}}
}
void var_simple_ptr(int *a) {
clang_analyzer_dump(a); // expected-warning {{SymRegion{reg_$1<int * a>}}}
clang_analyzer_dumpExtent(a); // expected-warning {{extent_$2{SymRegion{reg_$1<int * a>}}}}
clang_analyzer_dumpElementCount(a); // expected-warning {{(extent_$2{SymRegion{reg_$1<int * a>}}) / 4}}
}
void var_array() {
int a[] = {1, 2, 3};
clang_analyzer_dump(a); // expected-warning {{Element{a,0 S64b,int}}}
clang_analyzer_dumpExtent(a); // expected-warning {{12 S64b}}
clang_analyzer_dumpElementCount(a); // expected-warning {{3 S64b}}
}
void string() {
clang_analyzer_dump("foo"); // expected-warning {{Element{"foo",0 S64b,char}}}
clang_analyzer_dumpExtent("foo"); // expected-warning {{4 S64b}}
clang_analyzer_dumpElementCount("foo"); // expected-warning {{4 S64b}}
}
void struct_simple_ptr(S *a) {
clang_analyzer_dump(a); // expected-warning {{SymRegion{reg_$1<S * a>}}}
clang_analyzer_dumpExtent(a); // expected-warning {{extent_$2{SymRegion{reg_$1<S * a>}}}}
clang_analyzer_dumpElementCount(a); // expected-warning {{(extent_$2{SymRegion{reg_$1<S * a>}}) / 4}}
}
void field_ref(S a) {
clang_analyzer_dump(&a.f); // expected-warning {{a.f}}
clang_analyzer_dumpExtent(&a.f); // expected-warning {{4 S64b}}
clang_analyzer_dumpElementCount(&a.f); // expected-warning {{1 S64b}}
}
void field_ptr(S *a) {
clang_analyzer_dump(&a->f); // expected-warning {{Element{SymRegion{reg_$1<S * a>},0 S64b,struct S}.f}}
clang_analyzer_dumpExtent(&a->f); // expected-warning {{extent_$2{SymRegion{reg_$1<S * a>}}}}
clang_analyzer_dumpElementCount(&a->f); // expected-warning {{(extent_$2{SymRegion{reg_$1<S * a>}}) / 4U}}
}
void symbolic_array() {
int *a = new int[3];
clang_analyzer_dump(a); // expected-warning {{Element{HeapSymRegion{conj}}
clang_analyzer_dumpExtent(a); // expected-warning {{12 S64b}}
clang_analyzer_dumpElementCount(a); // expected-warning {{3 S64b}}
delete[] a;
}
void symbolic_placement_new() {
char *buf = new char[sizeof(int) * 3];
int *a = new (buf) int(12);
clang_analyzer_dump(a); // expected-warning {{Element{HeapSymRegion{conj}}
clang_analyzer_dumpExtent(a); // expected-warning {{12 S64b}}
clang_analyzer_dumpElementCount(a); // expected-warning {{3 S64b}}
delete[] buf;
}
void symbolic_malloc() {
int *a = (int *)malloc(12);
clang_analyzer_dump(a); // expected-warning {{Element{HeapSymRegion{conj}}
clang_analyzer_dumpExtent(a); // expected-warning {{12 S64b}}
clang_analyzer_dumpElementCount(a); // expected-warning {{3 S64b}}
free(a);
}
void symbolic_alloca() {
int *a = (int *)alloca(12);
clang_analyzer_dump(a); // expected-warning {{Element{alloca{}}
clang_analyzer_dumpExtent(a); // expected-warning {{12 S64b}}
clang_analyzer_dumpElementCount(a); // expected-warning {{3 S64b}}
}
void symbolic_complex() {
int *a = (int *)malloc(4);
clang_analyzer_dumpExtent(a); // expected-warning {{4 S64b}}
clang_analyzer_dumpElementCount(a); // expected-warning {{1 S64b}}
int *b = (int *)realloc(a, sizeof(int) * 2);
clang_analyzer_dumpExtent(b); // expected-warning {{8 S64b}}
clang_analyzer_dumpElementCount(b); // expected-warning {{2 S64b}}
free(b);
int *c = (int *)calloc(3, 4);
clang_analyzer_dumpExtent(c); // expected-warning {{12 S64b}}
clang_analyzer_dumpElementCount(c); // expected-warning {{3 S64b}}
free(c);
}
void signedness_equality() {
char *a = new char[sizeof(char) * 13];
char *b = (char *)malloc(13);
clang_analyzer_dump(clang_analyzer_getExtent(a)); // expected-warning {{13 S64b}}
clang_analyzer_dump(clang_analyzer_getExtent(b)); // expected-warning {{13 S64b}}
clang_analyzer_eval(clang_analyzer_getExtent(a) ==
clang_analyzer_getExtent(b));
// expected-warning@-2 {{TRUE}}
delete[] a;
free(b);
}
void default_new_aligned() {
struct alignas(32) S {};
S *a = new S[10];
clang_analyzer_dump(a); // expected-warning {{Element{HeapSymRegion{conj}}
clang_analyzer_dumpExtent(a); // expected-warning {{320 S64b}}
clang_analyzer_dumpElementCount(a); // expected-warning {{10 S64b}}
delete[] a;
}
void *operator new[](std::size_t, std::align_val_t, bool hack) throw();
void user_defined_new() {
int *a = new (std::align_val_t(32), true) int[10];
clang_analyzer_dump(a); // expected-warning {{Element{SymRegion{conj}}
clang_analyzer_dumpExtent(a); // expected-warning-re {{{{^extent_\$[0-9]\{SymRegion{conj}}}}
clang_analyzer_dumpElementCount(a); // expected-warning-re {{{{^\(extent_\$[0-9]\{SymRegion{conj.*\) / 4}}}}
operator delete[](a, std::align_val_t(32));
}
int a[5][0];
struct T {
int x[];
};
T t[5];
void zero_sized_element() {
clang_analyzer_dumpExtent(a); // expected-warning {{0 S64b}}
clang_analyzer_dumpElementCount(a); // expected-warning {{5 S64b}}
clang_analyzer_dumpExtent(t); // expected-warning {{0 S64b}}
clang_analyzer_dumpElementCount(t); // expected-warning {{5 S64b}}
}
void extent_with_offset() {
int nums[] = {1,2,3};
char *p = (char*)&nums[1];
clang_analyzer_dumpExtent(p); // expected-warning {{8 S64b}}
clang_analyzer_dumpElementCount(p); // expected-warning {{8 S64b}}
++p;
clang_analyzer_dumpExtent(p); // expected-warning {{7 S64b}}
clang_analyzer_dumpElementCount(p); // expected-warning {{7 S64b}}
++p;
int *q = (int*)p;
clang_analyzer_dumpExtent(q); // expected-warning {{6 S64b}}
clang_analyzer_dumpElementCount(q); // expected-warning {{1 S64b}}
}
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