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// RUN: %clang_analyze_cc1 -analyzer-checker=core,unix.cstring,unix.Malloc,alpha.unix.cstring,debug.ExprInspection -analyzer-store=region -verify %s
// RUN: %clang_analyze_cc1 -DUSE_BUILTINS -analyzer-checker=core,unix.cstring,unix.Malloc,alpha.unix.cstring,debug.ExprInspection -analyzer-store=region -verify %s
// RUN: %clang_analyze_cc1 -DVARIANT -analyzer-checker=core,unix.cstring,alpha.unix.cstring,unix.Malloc,debug.ExprInspection -analyzer-store=region -verify %s
// RUN: %clang_analyze_cc1 -DUSE_BUILTINS -DVARIANT -analyzer-checker=core,unix.cstring,alpha.unix.cstring,unix.Malloc,debug.ExprInspection -analyzer-store=region -verify %s
// RUN: %clang_analyze_cc1 -DSUPPRESS_OUT_OF_BOUND -analyzer-checker=core,unix.cstring,unix.Malloc,alpha.unix.cstring.BufferOverlap,alpha.unix.cstring.NotNullTerminated,debug.ExprInspection -analyzer-store=region -verify %s
#include "Inputs/system-header-simulator-cxx.h"
#include "Inputs/system-header-simulator-for-malloc.h"
// This provides us with four possible mempcpy() definitions.
// See also comments in bstring.c.
#ifdef USE_BUILTINS
#define BUILTIN(f) __builtin_##f
#else /* USE_BUILTINS */
#define BUILTIN(f) f
#endif /* USE_BUILTINS */
#ifdef VARIANT
#define __mempcpy_chk BUILTIN(__mempcpy_chk)
void *__mempcpy_chk(void *__restrict__ s1, const void *__restrict__ s2,
size_t n, size_t destlen);
#define mempcpy(a,b,c) __mempcpy_chk(a,b,c,(size_t)-1)
#else /* VARIANT */
#define mempcpy BUILTIN(mempcpy)
void *mempcpy(void *__restrict__ s1, const void *__restrict__ s2, size_t n);
#endif /* VARIANT */
void clang_analyzer_eval(int);
int *testStdCopyInvalidatesBuffer(std::vector<int> v) {
int n = v.size();
int *buf = (int *)malloc(n * sizeof(int));
buf[0] = 66;
// Call to copy should invalidate buf.
std::copy(v.begin(), v.end(), buf);
int i = buf[0];
clang_analyzer_eval(i == 66); // expected-warning {{UNKNOWN}}
return buf;
}
int *testStdCopyBackwardInvalidatesBuffer(std::vector<int> v) {
int n = v.size();
int *buf = (int *)malloc(n * sizeof(int));
buf[0] = 66;
// Call to copy_backward should invalidate buf.
std::copy_backward(v.begin(), v.end(), buf + n);
int i = buf[0];
clang_analyzer_eval(i == 66); // expected-warning {{UNKNOWN}}
return buf;
}
namespace pr34460 {
short a;
class b {
int c;
long g;
void d() {
int e = c;
f += e;
mempcpy(f, &a, g);
}
unsigned *f;
};
}
void *memset(void *dest, int ch, std::size_t count);
namespace memset_non_pod {
class Base {
public:
int b_mem;
Base() : b_mem(1) {}
};
class Derived : public Base {
public:
int d_mem;
Derived() : d_mem(2) {}
};
void memset1_inheritance() {
Derived d;
memset(&d, 0, sizeof(Derived));
clang_analyzer_eval(d.b_mem == 0); // expected-warning{{TRUE}}
clang_analyzer_eval(d.d_mem == 0); // expected-warning{{TRUE}}
}
#ifdef SUPPRESS_OUT_OF_BOUND
void memset2_inheritance_field() {
Derived d;
memset(&d.d_mem, 0, sizeof(Derived));
clang_analyzer_eval(d.b_mem == 0); // expected-warning{{UNKNOWN}}
clang_analyzer_eval(d.d_mem == 0); // expected-warning{{UNKNOWN}}
}
void memset3_inheritance_field() {
Derived d;
memset(&d.b_mem, 0, sizeof(Derived));
clang_analyzer_eval(d.b_mem == 0); // expected-warning{{TRUE}}
clang_analyzer_eval(d.d_mem == 0); // expected-warning{{TRUE}}
}
#endif
void memset4_array_nonpod_object() {
Derived array[10];
clang_analyzer_eval(array[1].b_mem == 1); // expected-warning{{UNKNOWN}}
clang_analyzer_eval(array[1].d_mem == 2); // expected-warning{{UNKNOWN}}
memset(&array[1], 0, sizeof(Derived));
clang_analyzer_eval(array[1].b_mem == 0); // expected-warning{{UNKNOWN}}
clang_analyzer_eval(array[1].d_mem == 0); // expected-warning{{UNKNOWN}}
}
void memset5_array_nonpod_object() {
Derived array[10];
clang_analyzer_eval(array[1].b_mem == 1); // expected-warning{{UNKNOWN}}
clang_analyzer_eval(array[1].d_mem == 2); // expected-warning{{UNKNOWN}}
memset(array, 0, sizeof(array));
clang_analyzer_eval(array[1].b_mem == 0); // expected-warning{{TRUE}}
clang_analyzer_eval(array[1].d_mem == 0); // expected-warning{{TRUE}}
}
void memset6_new_array_nonpod_object() {
Derived *array = new Derived[10];
clang_analyzer_eval(array[2].b_mem == 1); // expected-warning{{UNKNOWN}}
clang_analyzer_eval(array[2].d_mem == 2); // expected-warning{{UNKNOWN}}
memset(array, 0, 10 * sizeof(Derived));
clang_analyzer_eval(array[2].b_mem == 0); // expected-warning{{TRUE}}
clang_analyzer_eval(array[2].d_mem == 0); // expected-warning{{TRUE}}
delete[] array;
}
void memset7_placement_new() {
Derived *d = new Derived();
clang_analyzer_eval(d->b_mem == 1); // expected-warning{{TRUE}}
clang_analyzer_eval(d->d_mem == 2); // expected-warning{{TRUE}}
memset(d, 0, sizeof(Derived));
clang_analyzer_eval(d->b_mem == 0); // expected-warning{{TRUE}}
clang_analyzer_eval(d->d_mem == 0); // expected-warning{{TRUE}}
Derived *d1 = new (d) Derived();
clang_analyzer_eval(d1->b_mem == 1); // expected-warning{{TRUE}}
clang_analyzer_eval(d1->d_mem == 2); // expected-warning{{TRUE}}
memset(d1, 0, sizeof(Derived));
clang_analyzer_eval(d->b_mem == 0); // expected-warning{{TRUE}}
clang_analyzer_eval(d->d_mem == 0); // expected-warning{{TRUE}}
}
class BaseVirtual {
public:
int b_mem;
virtual int get() { return 1; }
};
class DerivedVirtual : public BaseVirtual {
public:
int d_mem;
};
#ifdef SUPPRESS_OUT_OF_BOUND
void memset8_virtual_inheritance_field() {
DerivedVirtual d;
memset(&d.b_mem, 0, sizeof(Derived));
clang_analyzer_eval(d.b_mem == 0); // expected-warning{{UNKNOWN}}
clang_analyzer_eval(d.d_mem == 0); // expected-warning{{UNKNOWN}}
}
#endif
} // namespace memset_non_pod
#ifdef SUPPRESS_OUT_OF_BOUND
void memset1_new_array() {
int *array = new int[10];
memset(array, 0, 10 * sizeof(int));
clang_analyzer_eval(array[2] == 0); // expected-warning{{TRUE}}
memset(array + 1, 'a', 10 * sizeof(9));
clang_analyzer_eval(array[2] == 0); // expected-warning{{UNKNOWN}}
delete[] array;
}
#endif
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