Added test/testsuites folder

My idea with this folder is to collect external suitable test cases so we can test Cppcheck on these.

test/testsuites/clang/outofbound.c

@@ -0,0 +1,128 @@
+// RUN: %clang_analyze_cc1 -Wno-array-bounds -analyzer-store=region -verify %s \
+// RUN:   -analyzer-checker=core \
+// RUN:   -analyzer-checker=unix \
+// RUN:   -analyzer-checker=alpha.security.ArrayBound \
+// RUN:   -analyzer-config unix.DynamicMemoryModeling:Optimistic=true
+
+typedef __typeof(sizeof(int)) size_t;
+void *malloc(size_t);
+void *calloc(size_t, size_t);
+
+char f1() {
+  char* s = "abcd";
+  char c = s[4]; // no-warning
+  return s[5] + c; // expected-warning{{Access out-of-bound array element (buffer overflow)}}
+}
+
+void f2() {
+  int *p = malloc(12);
+  p[3] = 4; // expected-warning{{Access out-of-bound array element (buffer overflow)}}
+}
+
+struct three_words {
+  int c[3];
+};
+
+struct seven_words {
+  int c[7];
+};
+
+void f3() {
+  struct three_words a, *p;
+  p = &a;
+  p[0] = a; // no-warning
+  p[1] = a; // expected-warning{{Access out-of-bound array element (buffer overflow)}}
+}
+
+void f4() {
+  struct seven_words c;
+  struct three_words a, *p = (struct three_words *)&c;
+  p[0] = a; // no-warning
+  p[1] = a; // no-warning
+  p[2] = a; // expected-warning{{Access out-of-bound array element (buffer overflow)}}
+}
+
+void f5() {
+  char *p = calloc(2,2);
+  p[3] = '.'; // no-warning
+  p[4] = '!'; // expected-warning{{out-of-bound}}
+}
+
+void f6() {
+  char a[2];
+  int *b = (int*)a;
+  b[1] = 3; // expected-warning{{out-of-bound}}
+}
+
+void f7() {
+  struct three_words a;
+  a.c[3] = 1; // expected-warning{{out-of-bound}}
+}
+
+void vla(int a) {
+  if (a == 5) {
+    int x[a];
+    x[4] = 4; // no-warning
+    x[5] = 5; // expected-warning{{out-of-bound}}
+  }
+}
+
+void alloca_region(int a) {
+  if (a == 5) {
+    char *x = __builtin_alloca(a);
+    x[4] = 4; // no-warning
+    x[5] = 5; // expected-warning{{out-of-bound}}
+  }
+}
+
+int symbolic_index(int a) {
+  int x[2] = {1, 2};
+  if (a == 2) {
+    return x[a]; // expected-warning{{out-of-bound}}
+  }
+  return 0;
+}
+
+int symbolic_index2(int a) {
+  int x[2] = {1, 2};
+  if (a < 0) {
+    return x[a]; // expected-warning{{out-of-bound}}
+  }
+  return 0;
+}
+
+int overflow_binary_search(double in) {
+  int eee = 16;
+  if (in < 1e-8 || in > 1e23) {
+    return 0;
+  } else {
+    static const double ins[] = {1e-8, 1e-7, 1e-6, 1e-5, 1e-4, 1e-3, 1e-2, 1e-1,
+                                 1e0, 1e1, 1e2, 1e3, 1e4, 1e5, 1e6, 1e7,
+                                 1e8, 1e9, 1e10, 1e11, 1e12, 1e13, 1e14, 1e15,
+                                 1e16, 1e17, 1e18, 1e19, 1e20, 1e21, 1e22};
+    if (in < ins[eee]) {
+      eee -= 8;
+    } else {
+      eee += 8;
+    }
+    if (in < ins[eee]) {
+      eee -= 4;
+    } else {
+      eee += 4;
+    }
+    if (in < ins[eee]) {
+      eee -= 2;
+    } else {
+      eee += 2;
+    }
+    if (in < ins[eee]) {
+      eee -= 1;
+    } else {
+      eee += 1;
+    }
+    if (in < ins[eee]) { // expected-warning {{Access out-of-bound array element (buffer overflow)}}
+      eee -= 1;
+    }
+  }
+  return eee;
+}

test/testsuites/clang/readme.txt

@@ -0,0 +1,3 @@
+arrayIndexOutOfBounds:
+~/llvm/tools/clang/test/Analysis/outofbound.c
+