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| // RUN: %clang_analyze_cc1 -triple x86_64-apple-darwin10 -disable-free -analyzer-checker=core,deadcode,debug.ExprInspection -verify %s
void clang_analyzer_eval(int);
int size_rdar9373039 = 1;
int foo_rdar9373039(const char *);
int rdar93730392() {
int x;
int j = 0;
for (int i = 0 ; i < size_rdar9373039 ; ++i)
x = 1;
int extra = (2 + foo_rdar9373039 ("Clang") + ((4 - ((unsigned int) (2 + foo_rdar9373039 ("Clang")) % 4)) % 4)) + (2 + foo_rdar9373039 ("1.0") + ((4 - ((unsigned int) (2 + foo_rdar9373039 ("1.0")) % 4)) % 4)); // expected-warning {{never read}}
for (int i = 0 ; i < size_rdar9373039 ; ++i)
j += x; // expected-warning {{garbage}}
return j;
}
int PR8962 (int *t) {
// This should look through the __extension__ no-op.
if (__extension__ (t)) return 0;
return *t; // expected-warning {{null pointer}}
}
int PR8962_b (int *t) {
// This should still ignore the nested casts
// which aren't handled by a single IgnoreParens()
if (((int)((int)t))) return 0;
return *t; // expected-warning {{null pointer}}
}
int PR8962_c (int *t) {
// If the last element in a StmtExpr was a ParenExpr, it's still live
if (({ (t ? (_Bool)0 : (_Bool)1); })) return 0;
return *t; // no-warning
}
int PR8962_d (int *t) {
// If the last element in a StmtExpr is an __extension__, it's still live
if (({ __extension__(t ? (_Bool)0 : (_Bool)1); })) return 0;
return *t; // no-warning
}
int PR8962_e (int *t) {
// Redundant casts can mess things up!
// Environment used to skip through NoOp casts, but LiveVariables didn't!
if (({ (t ? (int)(int)0L : (int)(int)1L); })) return 0;
return *t; // no-warning
}
int PR8962_f (int *t) {
// The StmtExpr isn't a block-level expression here,
// the __extension__ is. But the value should be attached to the StmtExpr
// anyway. Make sure the block-level check is /before/ IgnoreParens.
if ( __extension__({
_Bool r;
if (t) r = 0;
else r = 1;
r;
}) ) return 0;
return *t; // no-warning
}
// This previously crashed logic in the analyzer engine when evaluating locations.
void rdar10308201_aux(unsigned val);
void rdar10308201 (int valA, void *valB, unsigned valC) {
unsigned actual_base, lines;
if (valC == 0) {
actual_base = (unsigned)valB;
for (;;) {
if (valA & (1<<0))
rdar10308201_aux(actual_base);
}
}
}
typedef struct Struct103 {
unsigned i;
} Struct103;
typedef unsigned int size_t;
void __my_memset_chk(char*, int, size_t);
static int radar10367606(int t) {
Struct103 overall;
((__builtin_object_size ((char *) &overall, 0) != (size_t) -1) ? __builtin___memset_chk ((char *) &overall, 0, sizeof(Struct103), __builtin_object_size ((char *) &overall, 0)) : __my_memset_chk ((char *) &overall, 0, sizeof(Struct103)));
return 0;
}
/* Caching out on a sink node. */
extern int fooR10376675();
extern int* bazR10376675();
extern int nR10376675;
void barR10376675(int *x) {
int *pm;
if (nR10376675 * 2) {
int *pk = bazR10376675();
pm = pk; //expected-warning {{never read}}
}
do {
*x = fooR10376675();
} while (0);
}
// Test accesses to wide character strings doesn't break the analyzer.
typedef int wchar_t;
struct rdar10385775 {
wchar_t *name;
};
void RDar10385775(struct rdar10385775* p) {
p->name = L"a";
}
// Test double loop of array and array literals. Previously this
// resulted in a false positive uninitailized value warning.
void rdar10686586() {
int array1[] = { 1, 2, 3, 0 };
int array2[] = { 1, 2, 3, 0 };
int *array[] = { array1, array2 };
int sum = 0;
for (int i = 0; i < 2; i++) {
for (int j = 0; j < 4; j++) {
sum += array[i][j]; // no-warning
}
}
}
// This example tests CFG handling of '||' nested in a ternary expression,
// and seeing that the analyzer doesn't crash.
int isctype(char c, unsigned long f)
{
return (c < 1 || c > 10) ? 0 : !!(c & f);
}
// Test that symbolic array offsets are modeled conservatively.
// This was triggering a false "use of uninitialized value" warning.
void rdar_12075238__aux(unsigned long y);
int rdar_12075238_(unsigned long count) {
if ((count < 3) || (count > 6))
return 0;
unsigned long array[6];
unsigned long i = 0;
for (; i <= count - 2; i++)
{
array[i] = i;
}
array[count - 1] = i;
rdar_12075238__aux(array[2]); // no-warning
return 0;
}
// Test that we handle an uninitialized value within a logical expression.
void PR14635(int *p) {
int a = 0, b;
*p = a || b; // expected-warning {{Assigned value is garbage or undefined}}
}
// Test handling floating point values with unary '!'.
int PR14634(int x) {
double y = (double)x;
return !y;
}
// PR15684: If a checker generates a sink node after generating a regular node
// and no state changes between the two, graph trimming would consider the two
// the same node, forming a loop.
struct PR15684 {
void (*callback)(int);
};
void sinkAfterRegularNode(struct PR15684 *context) {
int uninitialized;
context->callback(uninitialized); // expected-warning {{uninitialized}}
}
// PR16131: C permits variables to be declared extern void.
static void PR16131(int x) {
extern void v;
int *ip = (int *)&v;
char *cp = (char *)&v;
clang_analyzer_eval(ip == cp); // expected-warning{{TRUE}}
// expected-warning@-1 {{comparison of distinct pointer types}}
*ip = 42;
clang_analyzer_eval(*ip == 42); // expected-warning{{TRUE}}
clang_analyzer_eval(*(int *)&v == 42); // expected-warning{{TRUE}}
}
// PR15623: Currently the analyzer doesn't handle symbolic expressions of the
// form "(exp comparison_op expr) != 0" very well. We perform a simplification
// translating an assume of a constraint of the form "(exp comparison_op expr)
// != 0" to true into an assume of "exp comparison_op expr" to true.
void PR15623(int n) {
if ((n == 0) != 0) {
clang_analyzer_eval(n == 0); // expected-warning{{TRUE}}
}
}
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