test/Analysis/no-outofbounds.c


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// RUN: %clang_cc1 -analyzer-check-objc-mem -analyze -analyzer-checker=core.experimental -analyzer-store=basic -verify %s
// RUN: %clang_cc1 -analyzer-check-objc-mem -analyze -analyzer-checker=core.experimental -analyzer-store=region -verify %s

//===----------------------------------------------------------------------===//
// This file tests cases where we should not flag out-of-bounds warnings.
//===----------------------------------------------------------------------===//

void f() {
  long x = 0;
  char *y = (char*) &x;
  char c = y[0] + y[1] + y[2]; // no-warning
  short *z = (short*) &x;
  short s = z[0] + z[1]; // no-warning
}

void g() {
  int a[2];
  char *b = (char*)a;
  b[3] = 'c'; // no-warning
}

typedef typeof(sizeof(int)) size_t;
void *malloc(size_t);
void free(void *);

void field() {
  struct vec { size_t len; int data[0]; };
  struct vec *a = malloc(sizeof(struct vec) + 10);
  a->len = 10;
  a->data[1] = 5; // no-warning
}