Add the clang library to the repo (with some of my changes, too).

1 files changed, 178 insertions, 0 deletions

diff --git a/clang/test/Analysis/array-struct.c b/clang/test/Analysis/array-struct.c
new file mode 100644
index 0000000..c5bdb86
--- /dev/null
+++ b/clang/test/Analysis/array-struct.c
@@ -0,0 +1,178 @@
+// RUN: %clang_cc1 -analyze -analyzer-checker=core,experimental.core.CastToStruct -analyzer-store=region -analyzer-constraints=basic -verify %s
+// RUN: %clang_cc1 -analyze -analyzer-checker=core,experimental.core.CastToStruct -analyzer-store=region -analyzer-constraints=range -verify %s
+
+struct s {
+  int data;
+  int data_array[10];
+};
+
+typedef struct {
+  int data;
+} STYPE;
+
+void g(char *p);
+void g1(struct s* p);
+
+// Array to pointer conversion. Array in the struct field.
+void f(void) {
+  int a[10];
+  int (*p)[10];
+  p = &a;
+  (*p)[3] = 1;
+  
+  struct s d;
+  struct s *q;
+  q = &d;
+  q->data = 3;
+  d.data_array[9] = 17;
+}
+
+// StringLiteral in lvalue context and pointer to array type.
+// p: ElementRegion, q: StringRegion
+void f2() {
+  char *p = "/usr/local";
+  char (*q)[4];
+  q = &"abc";
+}
+
+// Typedef'ed struct definition.
+void f3() {
+  STYPE s;
+}
+
+// Initialize array with InitExprList.
+void f4() {
+  int a[] = { 1, 2, 3};
+  int b[3] = { 1, 2 };
+  struct s c[] = {{1,{1}}};
+}
+
+// Struct variable in lvalue context.
+// Assign UnknownVal to the whole struct.
+void f5() {
+  struct s data;
+  g1(&data);
+}
+
+// AllocaRegion test.
+void f6() {
+  char *p;
+  p = __builtin_alloca(10); 
+  g(p);
+  char c = *p;
+  p[1] = 'a';
+  // Test if RegionStore::EvalBinOp converts the alloca region to element
+  // region.
+  p += 2;
+}
+
+struct s2;
+
+void g2(struct s2 *p);
+
+// Incomplete struct pointer used as function argument.
+void f7() {
+  struct s2 *p = __builtin_alloca(10);
+  g2(p);
+}
+
+// sizeof() is unsigned while -1 is signed in array index.
+void f8() {
+  int a[10];
+  a[sizeof(a)/sizeof(int) - 1] = 1; // no-warning
+}
+
+// Initialization of struct array elements.
+void f9() {
+  struct s a[10];
+}
+
+// Initializing array with string literal.
+void f10() {
+  char a1[4] = "abc";
+  char a3[6] = "abc";
+}
+
+// Retrieve the default value of element/field region.
+void f11() {
+  struct s a;
+  g1(&a);
+  if (a.data == 0) // no-warning
+    a.data = 1;
+}
+
+// Convert unsigned offset to signed when creating ElementRegion from 
+// SymbolicRegion.
+void f12(int *list) {
+  unsigned i = 0;
+  list[i] = 1;
+}
+
+struct s1 {
+  struct s2 {
+    int d;
+  } e;
+};
+
+// The binding of a.e.d should not be removed. Test recursive subregion map
+// building: a->e, e->d. Only then 'a' could be added to live region roots.
+void f13(double timeout) {
+  struct s1 a;
+  a.e.d = (int) timeout;
+  if (a.e.d == 10)
+    a.e.d = 4;
+}
+
+struct s3 {
+  int a[2];
+};
+
+static struct s3 opt;
+
+// Test if the embedded array is retrieved correctly.
+void f14() {
+  struct s3 my_opt = opt;
+}
+
+void bar(int*);
+
+// Test if the array is correctly invalidated.
+void f15() {
+  int a[10];
+  bar(a);
+  if (a[1]) // no-warning
+    (void)1;
+}
+
+struct s3 p[1];
+
+// Code from postgresql.
+// Current cast logic of region store mistakenly leaves the final result region
+// an ElementRegion of type 'char'. Then load a nonloc::SymbolVal from it and
+// assigns to 'a'. 
+void f16(struct s3 *p) {
+  struct s3 a = *((struct s3*) ((char*) &p[0])); // expected-warning{{Casting a non-structure type to a structure type and accessing a field can lead to memory access errors or data corruption.}}
+}
+
+void inv(struct s1 *);
+
+// Invalidate the struct field.
+void f17() {
+  struct s1 t;
+  int x;
+  inv(&t);
+  if (t.e.d)
+    x = 1;
+}
+
+void read(char*);
+
+void f18() {
+  char *q;
+  char *p = (char *) __builtin_alloca(10);
+  read(p);
+  q = p;
+  q++;
+  if (*q) { // no-warning
+  }
+}