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// RUN: %clang_analyze_cc1 -x c++ -analyzer-checker=core -analyzer-output=text -verify %s
typedef unsigned char uint8_t;
#define UINT8_MAX 255
#define TCP_MAXWIN 65535
uint8_t get_uint8_max() {
uint8_t rcvscale = UINT8_MAX; // expected-note{{'rcvscale' initialized to 255}}
return rcvscale; // expected-note{{Returning the value 255 (loaded from 'rcvscale')}}
}
void shift_by_undefined_value() {
uint8_t shift_amount = get_uint8_max(); // expected-note{{'shift_amount' initialized to 255}}
// expected-note@-1{{Calling 'get_uint8_max'}}
// expected-note@-2{{Returning from 'get_uint8_max'}}
(void)(TCP_MAXWIN << shift_amount); // expected-warning{{The result of the left shift is undefined due to shifting by '255', which is greater or equal to the width of type 'int'}}
// expected-note@-1{{The result of the left shift is undefined due to shifting by '255', which is greater or equal to the width of type 'int'}}
}
namespace array_index_tracking {
void consume(int);
int getIndex(int x) {
int a;
if (x > 0)
a = 3;
else
a = 2;
return a;
}
int getInt();
void testArrayIndexTracking() {
int arr[10];
for (int i = 0; i < 3; ++i)
arr[i] = 0;
int x = getInt();
int n = getIndex(x);
consume(arr[n]);
}
} // end of namespace array_index_tracking
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