Merge branch 'master' of ssh://bitbucket.org/czan/honours

1 files changed, 124 insertions, 0 deletions

diff --git a/clang/test/Analysis/uninit-vals-ps.c b/clang/test/Analysis/uninit-vals-ps.c
new file mode 100644
index 0000000..f301157
--- /dev/null
+++ b/clang/test/Analysis/uninit-vals-ps.c
@@ -0,0 +1,124 @@
+// RUN: %clang_cc1 -analyze -analyzer-checker=core -analyzer-store=region -verify %s
+
+struct FPRec {
+  void (*my_func)(int * x);  
+};
+
+int bar(int x);
+
+int f1_a(struct FPRec* foo) {
+  int x;
+  (*foo->my_func)(&x);
+  return bar(x)+1; // no-warning
+}
+
+int f1_b() {
+  int x;
+  return bar(x)+1;  // expected-warning{{Function call argument is an uninitialized value}}
+}
+
+int f2() {
+  
+  int x;
+  
+  if (x+1)  // expected-warning{{The left operand of '+' is a garbage value}}
+    return 1;
+    
+  return 2;  
+}
+
+int f2_b() {
+  int x;
+  
+  return ((1+x)+2+((x))) + 1 ? 1 : 2; // expected-warning{{The right operand of '+' is a garbage value}}
+}
+
+int f3(void) {
+  int i;
+  int *p = &i;
+  if (*p > 0) // expected-warning{{The left operand of '>' is a garbage value}}
+    return 0;
+  else
+    return 1;
+}
+
+void f4_aux(float* x);
+float f4(void) {
+  float x;
+  f4_aux(&x);
+  return x;  // no-warning
+}
+
+struct f5_struct { int x; };
+void f5_aux(struct f5_struct* s);
+int f5(void) {
+  struct f5_struct s;
+  f5_aux(&s);
+  return s.x; // no-warning
+}
+
+int ret_uninit() {
+  int i;
+  int *p = &i;
+  return *p;  // expected-warning{{Undefined or garbage value returned to caller}}
+}
+
+// <rdar://problem/6451816>
+typedef unsigned char Boolean;
+typedef const struct __CFNumber * CFNumberRef;
+typedef signed long CFIndex;
+typedef CFIndex CFNumberType;
+typedef unsigned long UInt32;
+typedef UInt32 CFStringEncoding;
+typedef const struct __CFString * CFStringRef;
+extern Boolean CFNumberGetValue(CFNumberRef number, CFNumberType theType, void *valuePtr);
+extern CFStringRef CFStringConvertEncodingToIANACharSetName(CFStringEncoding encoding);
+
+CFStringRef rdar_6451816(CFNumberRef nr) {
+  CFStringEncoding encoding;
+  // &encoding is casted to void*.  This test case tests whether or not
+  // we properly invalidate the value of 'encoding'.
+  CFNumberGetValue(nr, 9, &encoding);
+  return CFStringConvertEncodingToIANACharSetName(encoding); // no-warning
+}
+
+// PR 4630 - false warning with nonnull attribute
+//  This false positive (due to a regression) caused the analyzer to falsely
+//  flag a "return of uninitialized value" warning in the first branch due to
+//  the nonnull attribute.
+void pr_4630_aux(char *x, int *y) __attribute__ ((nonnull (1)));
+void pr_4630_aux_2(char *x, int *y);
+int pr_4630(char *a, int y) {
+  int x;
+  if (y) {
+    pr_4630_aux(a, &x);
+    return x;   // no-warning
+  }
+  else {
+    pr_4630_aux_2(a, &x);
+    return x;   // no-warning
+  }
+}
+
+// PR 4631 - False positive with union initializer
+//  Previously the analyzer didn't examine the compound initializers of unions,
+//  resulting in some false positives for initializers with side-effects.
+union u_4631 { int a; };
+struct s_4631 { int a; };
+int pr4631_f2(int *p);
+int pr4631_f3(void *q);
+int pr4631_f1(void)
+{
+  int x;
+  union u_4631 m = { pr4631_f2(&x) };
+  pr4631_f3(&m); // tell analyzer that we use m
+  return x;  // no-warning
+}
+int pr4631_f1_b(void)
+{
+  int x;
+  struct s_4631 m = { pr4631_f2(&x) };
+  pr4631_f3(&m); // tell analyzer that we use m
+  return x;  // no-warning
+}
+