1366 lines
41 KiB
Objective-C
1366 lines
41 KiB
Objective-C
// RUN: %clang_cc1 -triple i386-apple-darwin9 -analyze -analyzer-checker=core,alpha.deadcode.IdempotentOperations,alpha.core.CastToStruct,alpha.security.ReturnPtrRange,alpha.security.ArrayBound -analyzer-store=region -verify -fblocks -analyzer-opt-analyze-nested-blocks -Wno-objc-root-class %s
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// RUN: %clang_cc1 -triple x86_64-apple-darwin9 -DTEST_64 -analyze -analyzer-checker=core,alpha.deadcode.IdempotentOperations,alpha.core.CastToStruct,alpha.security.ReturnPtrRange,alpha.security.ArrayBound -analyzer-store=region -verify -fblocks -analyzer-opt-analyze-nested-blocks -Wno-objc-root-class %s
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typedef long unsigned int size_t;
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void *memcpy(void *, const void *, size_t);
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void *alloca(size_t);
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typedef struct objc_selector *SEL;
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typedef signed char BOOL;
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typedef int NSInteger;
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typedef unsigned int NSUInteger;
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typedef struct _NSZone NSZone;
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@class NSInvocation, NSMethodSignature, NSCoder, NSString, NSEnumerator;
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@protocol NSObject - (BOOL)isEqual:(id)object; @end
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@protocol NSCopying - (id)copyWithZone:(NSZone *)zone; @end
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@protocol NSMutableCopying - (id)mutableCopyWithZone:(NSZone *)zone; @end
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@protocol NSCoding - (void)encodeWithCoder:(NSCoder *)aCoder; @end
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@interface NSObject <NSObject> {} - (id)init; @end
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extern id NSAllocateObject(Class aClass, NSUInteger extraBytes, NSZone *zone);
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@interface NSString : NSObject <NSCopying, NSMutableCopying, NSCoding>
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- (NSUInteger)length;
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+ (id)stringWithUTF8String:(const char *)nullTerminatedCString;
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@end extern NSString * const NSBundleDidLoadNotification;
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@interface NSAssertionHandler : NSObject {}
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+ (NSAssertionHandler *)currentHandler;
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- (void)handleFailureInMethod:(SEL)selector object:(id)object file:(NSString *)fileName lineNumber:(NSInteger)line description:(NSString *)format,...;
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@end
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extern NSString * const NSConnectionReplyMode;
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#ifdef TEST_64
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typedef long long int64_t;
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typedef int64_t intptr_t;
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#else
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typedef int int32_t;
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typedef int32_t intptr_t;
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#endif
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//---------------------------------------------------------------------------
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// Test case 'checkaccess_union' differs for region store and basic store.
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// The basic store doesn't reason about compound literals, so the code
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// below won't fire an "uninitialized value" warning.
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//---------------------------------------------------------------------------
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// PR 2948 (testcase; crash on VisitLValue for union types)
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// http://llvm.org/bugs/show_bug.cgi?id=2948
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void checkaccess_union() {
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int ret = 0, status;
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// Since RegionStore doesn't handle unions yet,
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// this branch condition won't be triggered
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// as involving an uninitialized value.
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if (((((__extension__ (((union { // no-warning
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__typeof (status) __in; int __i;}
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)
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{
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.__in = (status)}
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).__i))) & 0xff00) >> 8) == 1)
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ret = 1;
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}
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// Check our handling of fields being invalidated by function calls.
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struct test2_struct { int x; int y; char* s; };
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void test2_help(struct test2_struct* p);
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char test2() {
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struct test2_struct s;
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test2_help(&s);
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char *p = 0;
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if (s.x > 1) {
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if (s.s != 0) {
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p = "hello";
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}
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}
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if (s.x > 1) {
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if (s.s != 0) {
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return *p;
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}
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}
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return 'a';
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}
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// BasicStore handles this case incorrectly because it doesn't reason about
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// the value pointed to by 'x' and thus creates different symbolic values
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// at the declarations of 'a' and 'b' respectively. RegionStore handles
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// it correctly. See the companion test in 'misc-ps-basic-store.m'.
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void test_trivial_symbolic_comparison_pointer_parameter(int *x) {
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int a = *x;
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int b = *x;
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if (a != b) {
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int *p = 0;
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*p = 0xDEADBEEF; // no-warning
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}
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}
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// This is a modified test from 'misc-ps.m'. Here we have the extra
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// NULL dereferences which are pruned out by RegionStore's symbolic reasoning
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// of fields.
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typedef struct _BStruct { void *grue; } BStruct;
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void testB_aux(void *ptr);
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void testB(BStruct *b) {
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{
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int *__gruep__ = ((int *)&((b)->grue));
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int __gruev__ = *__gruep__;
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int __gruev2__ = *__gruep__;
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if (__gruev__ != __gruev2__) {
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int *p = 0;
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*p = 0xDEADBEEF; // no-warning
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}
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testB_aux(__gruep__);
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}
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{
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int *__gruep__ = ((int *)&((b)->grue));
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int __gruev__ = *__gruep__;
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int __gruev2__ = *__gruep__;
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if (__gruev__ != __gruev2__) {
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int *p = 0;
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*p = 0xDEADBEEF; // no-warning
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}
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if (~0 != __gruev__) {}
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}
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}
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void testB_2(BStruct *b) {
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{
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int **__gruep__ = ((int **)&((b)->grue));
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int *__gruev__ = *__gruep__;
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testB_aux(__gruep__);
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}
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{
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int **__gruep__ = ((int **)&((b)->grue));
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int *__gruev__ = *__gruep__;
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if ((int*)~0 != __gruev__) {}
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}
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}
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// This test case is a reduced case of a caching bug discovered by an
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// assertion failure in RegionStoreManager::BindArray. Essentially the
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// DeclStmt is evaluated twice, but on the second loop iteration the
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// engine caches out. Previously a false transition would cause UnknownVal
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// to bind to the variable, firing an assertion failure. This bug was fixed
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// in r76262.
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void test_declstmt_caching() {
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again:
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{
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const char a[] = "I like to crash";
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goto again;
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}
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}
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//===----------------------------------------------------------------------===//
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// Reduced test case from <rdar://problem/7114618>.
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// Basically a null check is performed on the field value, which is then
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// assigned to a variable and then checked again.
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//===----------------------------------------------------------------------===//
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struct s_7114618 { int *p; };
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void test_rdar_7114618(struct s_7114618 *s) {
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if (s->p) {
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int *p = s->p;
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if (!p) {
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// Infeasible
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int *dead = 0;
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*dead = 0xDEADBEEF; // no-warning
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}
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}
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}
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// Test pointers increment correctly.
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void f() {
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int a[2];
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a[1] = 3;
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int *p = a;
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p++;
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if (*p != 3) {
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int *q = 0;
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*q = 3; // no-warning
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}
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}
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//===----------------------------------------------------------------------===//
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// <rdar://problem/7185607>
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// Bit-fields of a struct should be invalidated when blasting the entire
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// struct with an integer constant.
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//===----------------------------------------------------------------------===//
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struct test_7185607 {
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int x : 10;
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int y : 22;
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};
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int rdar_test_7185607() {
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struct test_7185607 s; // Uninitialized.
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*((unsigned *) &s) = 0U;
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return s.x; // no-warning
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}
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//===----------------------------------------------------------------------===//
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// <rdar://problem/7242006> [RegionStore] compound literal assignment with
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// floats not honored
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// This test case is mirrored in misc-ps.m, but this case is a negative.
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//===----------------------------------------------------------------------===//
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typedef float CGFloat;
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typedef struct _NSSize {
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CGFloat width;
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CGFloat height;
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} NSSize;
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CGFloat rdar7242006_negative(CGFloat x) {
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NSSize y;
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return y.width; // expected-warning{{garbage}}
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}
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//===----------------------------------------------------------------------===//
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// <rdar://problem/7249340> - Allow binding of values to symbolic regions.
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// This test case shows how RegionStore tracks the value bound to 'x'
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// after the assignment.
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//===----------------------------------------------------------------------===//
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typedef int* ptr_rdar_7249340;
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void rdar_7249340(ptr_rdar_7249340 x) {
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*x = 1;
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if (*x)
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return;
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int *p = 0; // This is unreachable.
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*p = 0xDEADBEEF; // no-warning
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}
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//===----------------------------------------------------------------------===//
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// <rdar://problem/7249327> - This test case tests both value tracking of
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// array values and that we handle symbolic values that are casted
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// between different integer types. Note the assignment 'n = *a++'; here
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// 'n' is and 'int' and '*a' is 'unsigned'. Previously we got a false positive
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// at 'x += *b++' (undefined value) because we got a false path.
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//===----------------------------------------------------------------------===//
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int rdar_7249327_aux(void);
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void rdar_7249327(unsigned int A[2*32]) {
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int B[2*32];
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int *b;
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unsigned int *a;
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int x = 0;
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int n;
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a = A;
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b = B;
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n = *a++;
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if (n)
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*b++ = rdar_7249327_aux();
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a = A;
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b = B;
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n = *a++; // expected-warning{{Assigned value is always the same as the existing value}}
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if (n)
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x += *b++; // no-warning
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}
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//===----------------------------------------------------------------------===//
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// <rdar://problem/6914474> - Check that 'x' is invalidated because its
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// address is passed in as a value to a struct.
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//===----------------------------------------------------------------------===//
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struct doodad_6914474 { int *v; };
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extern void prod_6914474(struct doodad_6914474 *d);
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int rdar_6914474(void) {
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int x;
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struct doodad_6914474 d;
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d.v = &x;
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prod_6914474(&d);
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return x; // no-warning
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}
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// Test invalidation of a single field.
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struct s_test_field_invalidate {
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int x;
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};
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extern void test_invalidate_field(int *x);
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int test_invalidate_field_test() {
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struct s_test_field_invalidate y;
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test_invalidate_field(&y.x);
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return y.x; // no-warning
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}
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int test_invalidate_field_test_positive() {
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struct s_test_field_invalidate y;
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return y.x; // expected-warning{{garbage}}
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}
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// This test case illustrates how a typeless array of bytes casted to a
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// struct should be treated as initialized. RemoveDeadBindings previously
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// had a bug that caused 'x' to lose its default symbolic value after the
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// assignment to 'p', thus causing 'p->z' to evaluate to "undefined".
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struct ArrayWrapper { unsigned char y[16]; };
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struct WrappedStruct { unsigned z; };
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void test_handle_array_wrapper_helper();
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int test_handle_array_wrapper() {
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struct ArrayWrapper x;
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test_handle_array_wrapper_helper(&x);
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struct WrappedStruct *p = (struct WrappedStruct*) x.y; // expected-warning{{Casting a non-structure type to a structure type and accessing a field can lead to memory access errors or data corruption}}
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return p->z; // no-warning
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}
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//===----------------------------------------------------------------------===//
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// <rdar://problem/7261075> [RegionStore] crash when
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// handling load: '*((unsigned int *)"????")'
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//===----------------------------------------------------------------------===//
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int rdar_7261075(void) {
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unsigned int var = 0;
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if (var == *((unsigned int *)"????"))
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return 1;
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return 0;
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}
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//===----------------------------------------------------------------------===//
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// <rdar://problem/7275774> false path due to limited pointer
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// arithmetic constraints
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//===----------------------------------------------------------------------===//
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void rdar_7275774(void *data, unsigned n) {
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if (!(data || n == 0))
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return;
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unsigned short *p = (unsigned short*) data;
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unsigned short *q = p + (n / 2);
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|
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if (p < q) {
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// If we reach here, 'p' cannot be null. If 'p' is null, then 'n' must
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// be '0', meaning that this branch is not feasible.
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*p = *q; // no-warning
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}
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}
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//===----------------------------------------------------------------------===//
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// <rdar://problem/7312221>
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//
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// Test that Objective-C instance variables aren't prematurely pruned
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// from the analysis state.
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//===----------------------------------------------------------------------===//
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struct rdar_7312221_value { int x; };
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@interface RDar7312221
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{
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struct rdar_7312221_value *y;
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}
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- (void) doSomething_7312221;
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@end
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extern struct rdar_7312221_value *rdar_7312221_helper();
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extern int rdar_7312221_helper_2(id o);
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extern void rdar_7312221_helper_3(int z);
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@implementation RDar7312221
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- (void) doSomething_7312221 {
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if (y == 0) {
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y = rdar_7312221_helper();
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if (y != 0) {
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y->x = rdar_7312221_helper_2(self);
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// The following use of 'y->x' previously triggered a null dereference, as the value of 'y'
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// before 'y = rdar_7312221_helper()' would be used.
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rdar_7312221_helper_3(y->x); // no-warning
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}
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}
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}
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@end
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struct rdar_7312221_container {
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struct rdar_7312221_value *y;
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};
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extern int rdar_7312221_helper_4(struct rdar_7312221_container *s);
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// This test case essentially matches the one in [RDar7312221 doSomething_7312221].
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void doSomething_7312221_with_struct(struct rdar_7312221_container *Self) {
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if (Self->y == 0) {
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Self->y = rdar_7312221_helper();
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if (Self->y != 0) {
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Self->y->x = rdar_7312221_helper_4(Self);
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rdar_7312221_helper_3(Self->y->x); // no-warning
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}
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}
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}
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//===----------------------------------------------------------------------===//
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// <rdar://problem/7332673> - Just more tests cases for regions
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//===----------------------------------------------------------------------===//
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void rdar_7332673_test1() {
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char value[1];
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if ( *(value) != 1 ) {} // expected-warning{{The left operand of '!=' is a garbage value}}
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}
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int rdar_7332673_test2_aux(char *x);
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void rdar_7332673_test2() {
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char *value;
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if ( rdar_7332673_test2_aux(value) != 1 ) {} // expected-warning{{Function call argument is an uninitialized value}}
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}
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//===----------------------------------------------------------------------===//
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// <rdar://problem/7347252>: Because of a bug in
|
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// RegionStoreManager::RemoveDeadBindings(), the symbol for s->session->p
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|
// would incorrectly be pruned from the state after the call to
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|
// rdar7347252_malloc1(), and would incorrectly result in a warning about
|
|
// passing a null pointer to rdar7347252_memcpy().
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|
//===----------------------------------------------------------------------===//
|
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struct rdar7347252_AA { char *p;};
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typedef struct {
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struct rdar7347252_AA *session;
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int t;
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char *q;
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} rdar7347252_SSL1;
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int rdar7347252_f(rdar7347252_SSL1 *s);
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|
char *rdar7347252_malloc1(int);
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char *rdar7347252_memcpy1(char *d, char *s, int n) __attribute__((nonnull (1,2)));
|
|
|
|
int rdar7347252(rdar7347252_SSL1 *s) {
|
|
rdar7347252_f(s); // the SymbolicRegion of 's' is set a default binding of conjured symbol
|
|
if (s->session->p == ((void*)0)) {
|
|
if ((s->session->p = rdar7347252_malloc1(10)) == ((void*)0)) {
|
|
return 0;
|
|
}
|
|
rdar7347252_memcpy1(s->session->p, "aa", 2); // no-warning
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// PR 5316 - "crash when accessing field of lazy compound value"
|
|
// Previously this caused a crash at the MemberExpr '.chr' when loading
|
|
// a field value from a LazyCompoundVal
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
typedef unsigned int pr5316_wint_t;
|
|
typedef pr5316_wint_t pr5316_REFRESH_CHAR;
|
|
typedef struct {
|
|
pr5316_REFRESH_CHAR chr;
|
|
}
|
|
pr5316_REFRESH_ELEMENT;
|
|
static void pr5316(pr5316_REFRESH_ELEMENT *dst, const pr5316_REFRESH_ELEMENT *src) {
|
|
while ((*dst++ = *src++).chr != L'\0') ;
|
|
}
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// Exercise creating ElementRegion with symbolic super region.
|
|
//===----------------------------------------------------------------------===//
|
|
void element_region_with_symbolic_superregion(int* p) {
|
|
int *x;
|
|
int a;
|
|
if (p[0] == 1)
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|
x = &a;
|
|
if (p[0] == 1)
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|
(void)*x; // no-warning
|
|
}
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// Test returning an out-of-bounds pointer (CWE-466)
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
static int test_cwe466_return_outofbounds_pointer_a[10];
|
|
int *test_cwe466_return_outofbounds_pointer() {
|
|
int *p = test_cwe466_return_outofbounds_pointer_a+10;
|
|
return p; // expected-warning{{Returned pointer value points outside the original object}}
|
|
}
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// PR 3135 - Test case that shows that a variable may get invalidated when its
|
|
// address is included in a structure that is passed-by-value to an unknown function.
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
typedef struct { int *a; } pr3135_structure;
|
|
int pr3135_bar(pr3135_structure *x);
|
|
int pr3135() {
|
|
int x;
|
|
pr3135_structure y = { &x };
|
|
// the call to pr3135_bar may initialize x
|
|
if (pr3135_bar(&y) && x) // no-warning
|
|
return 1;
|
|
return 0;
|
|
}
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// <rdar://problem/7403269> - Test that we handle compound initializers with
|
|
// partially unspecified array values. Previously this caused a crash.
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
typedef struct RDar7403269 {
|
|
unsigned x[10];
|
|
unsigned y;
|
|
} RDar7403269;
|
|
|
|
void rdar7403269() {
|
|
RDar7403269 z = { .y = 0 };
|
|
if (z.x[4] == 0)
|
|
return;
|
|
int *p = 0;
|
|
*p = 0xDEADBEEF; // no-warning
|
|
}
|
|
|
|
typedef struct RDar7403269_b {
|
|
struct zorg { int w; int k; } x[10];
|
|
unsigned y;
|
|
} RDar7403269_b;
|
|
|
|
void rdar7403269_b() {
|
|
RDar7403269_b z = { .y = 0 };
|
|
if (z.x[5].w == 0)
|
|
return;
|
|
int *p = 0;
|
|
*p = 0xDEADBEEF; // no-warning
|
|
}
|
|
|
|
void rdar7403269_b_pos() {
|
|
RDar7403269_b z = { .y = 0 };
|
|
if (z.x[5].w == 1)
|
|
return;
|
|
int *p = 0;
|
|
*p = 0xDEADBEEF; // expected-warning{{Dereference of null pointer}}
|
|
}
|
|
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// Test that incrementing a non-null pointer results in a non-null pointer.
|
|
// (<rdar://problem/7191542>)
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
void test_increment_nonnull_rdar_7191542(const char *path) {
|
|
const char *alf = 0;
|
|
|
|
for (;;) {
|
|
// When using basic-store, we get a null dereference here because we lose information
|
|
// about path after the pointer increment.
|
|
char c = *path++; // no-warning
|
|
if (c == 'a') {
|
|
alf = path;
|
|
}
|
|
|
|
if (alf)
|
|
return;
|
|
}
|
|
}
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// Test that the store (implicitly) tracks values for doubles/floats that are
|
|
// uninitialized (<rdar://problem/6811085>)
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
double rdar_6811085(void) {
|
|
double u;
|
|
return u + 10; // expected-warning{{The left operand of '+' is a garbage value}}
|
|
}
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// Path-sensitive tests for blocks.
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
void indirect_block_call(void (^f)());
|
|
|
|
int blocks_1(int *p, int z) {
|
|
__block int *q = 0;
|
|
void (^bar)() = ^{ q = p; };
|
|
|
|
if (z == 1) {
|
|
// The call to 'bar' might cause 'q' to be invalidated.
|
|
bar();
|
|
*q = 0x1; // no-warning
|
|
}
|
|
else if (z == 2) {
|
|
// The function 'indirect_block_call' might invoke bar, thus causing
|
|
// 'q' to possibly be invalidated.
|
|
indirect_block_call(bar);
|
|
*q = 0x1; // no-warning
|
|
}
|
|
else {
|
|
*q = 0xDEADBEEF; // expected-warning{{Dereference of null pointer}}
|
|
}
|
|
return z;
|
|
}
|
|
|
|
int blocks_2(int *p, int z) {
|
|
int *q = 0;
|
|
void (^bar)(int **) = ^(int **r){ *r = p; };
|
|
|
|
if (z) {
|
|
// The call to 'bar' might cause 'q' to be invalidated.
|
|
bar(&q);
|
|
*q = 0x1; // no-warning
|
|
}
|
|
else {
|
|
*q = 0xDEADBEEF; // expected-warning{{Dereference of null pointer}}
|
|
}
|
|
return z;
|
|
}
|
|
|
|
// Test that the value of 'x' is considered invalidated after the block
|
|
// is passed as an argument to the message expression.
|
|
typedef void (^RDar7582031CB)(void);
|
|
@interface RDar7582031
|
|
- rdar7582031:RDar7582031CB;
|
|
- rdar7582031_b:RDar7582031CB;
|
|
@end
|
|
|
|
// Test with one block.
|
|
unsigned rdar7582031(RDar7582031 *o) {
|
|
__block unsigned x;
|
|
[o rdar7582031:^{ x = 1; }];
|
|
return x; // no-warning
|
|
}
|
|
|
|
// Test with two blocks.
|
|
unsigned long rdar7582031_b(RDar7582031 *o) {
|
|
__block unsigned y;
|
|
__block unsigned long x;
|
|
[o rdar7582031:^{ y = 1; }];
|
|
[o rdar7582031_b:^{ x = 1LL; }];
|
|
return x + (unsigned long) y; // no-warning
|
|
}
|
|
|
|
// Show we get an error when 'o' is null because the message
|
|
// expression has no effect.
|
|
unsigned long rdar7582031_b2(RDar7582031 *o) {
|
|
__block unsigned y;
|
|
__block unsigned long x;
|
|
if (o)
|
|
return 1;
|
|
[o rdar7582031:^{ y = 1; }];
|
|
[o rdar7582031_b:^{ x = 1LL; }];
|
|
return x + (unsigned long) y; // expected-warning{{The left operand of '+' is a garbage value}}
|
|
}
|
|
|
|
// Show that we handle static variables also getting invalidated.
|
|
void rdar7582031_aux(void (^)(void));
|
|
RDar7582031 *rdar7582031_aux_2();
|
|
|
|
unsigned rdar7582031_static() {
|
|
static RDar7582031 *o = 0;
|
|
rdar7582031_aux(^{ o = rdar7582031_aux_2(); });
|
|
|
|
__block unsigned x;
|
|
[o rdar7582031:^{ x = 1; }];
|
|
return x; // no-warning
|
|
}
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// <rdar://problem/7462324> - Test that variables passed using __blocks
|
|
// are not treated as being uninitialized.
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
typedef void (^RDar_7462324_Callback)(id obj);
|
|
|
|
@interface RDar7462324
|
|
- (void) foo:(id)target;
|
|
- (void) foo_positive:(id)target;
|
|
|
|
@end
|
|
|
|
@implementation RDar7462324
|
|
- (void) foo:(id)target {
|
|
__block RDar_7462324_Callback builder = ((void*) 0);
|
|
builder = ^(id object) {
|
|
if (object) {
|
|
builder(self); // no-warning
|
|
}
|
|
};
|
|
builder(target);
|
|
}
|
|
- (void) foo_positive:(id)target {
|
|
__block RDar_7462324_Callback builder = ((void*) 0);
|
|
builder = ^(id object) {
|
|
id x;
|
|
if (object) {
|
|
builder(x); // expected-warning{{Block call argument is an uninitialized value}}
|
|
}
|
|
};
|
|
builder(target);
|
|
}
|
|
@end
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// <rdar://problem/7468209> - Scanning for live variables within a block should
|
|
// not crash on variables passed by reference via __block.
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
int rdar7468209_aux();
|
|
void rdar7468209_aux_2();
|
|
|
|
void rdar7468209() {
|
|
__block int x = 0;
|
|
^{
|
|
x = rdar7468209_aux();
|
|
// We need a second statement so that 'x' would be removed from the store if it wasn't
|
|
// passed by reference.
|
|
rdar7468209_aux_2();
|
|
}();
|
|
}
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// PR 5857 - Test loading an integer from a byte array that has also been
|
|
// reinterpreted to be loaded as a field.
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
typedef struct { int x; } TestFieldLoad;
|
|
int pr5857(char *src) {
|
|
TestFieldLoad *tfl = (TestFieldLoad *) (intptr_t) src;
|
|
int y = tfl->x;
|
|
long long *z = (long long *) (intptr_t) src;
|
|
long long w = 0;
|
|
int n = 0;
|
|
for (n = 0; n < y; ++n) {
|
|
// Previously we crashed analyzing this statement.
|
|
w = *z++;
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// PR 4358 - Without field-sensitivity, this code previously triggered
|
|
// a false positive that 'uninit' could be uninitialized at the call
|
|
// to pr4358_aux().
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
struct pr4358 {
|
|
int bar;
|
|
int baz;
|
|
};
|
|
void pr4358_aux(int x);
|
|
void pr4358(struct pr4358 *pnt) {
|
|
int uninit;
|
|
if (pnt->bar < 3) {
|
|
uninit = 1;
|
|
} else if (pnt->baz > 2) {
|
|
uninit = 3;
|
|
} else if (pnt->baz <= 2) {
|
|
uninit = 2;
|
|
}
|
|
pr4358_aux(uninit); // no-warning
|
|
}
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// <rdar://problem/7526777>
|
|
// Test handling fields of values returned from function calls or
|
|
// message expressions.
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
typedef struct testReturn_rdar_7526777 {
|
|
int x;
|
|
int y;
|
|
} testReturn_rdar_7526777;
|
|
|
|
@interface TestReturnStruct_rdar_7526777
|
|
- (testReturn_rdar_7526777) foo;
|
|
@end
|
|
|
|
int test_return_struct(TestReturnStruct_rdar_7526777 *x) {
|
|
return [x foo].x;
|
|
}
|
|
|
|
testReturn_rdar_7526777 test_return_struct_2_aux_rdar_7526777();
|
|
|
|
int test_return_struct_2_rdar_7526777() {
|
|
return test_return_struct_2_aux_rdar_7526777().x;
|
|
}
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// <rdar://problem/7527292> Assertion failed: (Op == BinaryOperator::Add ||
|
|
// Op == BinaryOperator::Sub)
|
|
// This test case previously triggered an assertion failure due to a discrepancy
|
|
// been the loaded/stored value in the array
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
_Bool OSAtomicCompareAndSwapPtrBarrier( void *__oldValue, void *__newValue, void * volatile *__theValue );
|
|
|
|
void rdar_7527292() {
|
|
static id Cache7527292[32];
|
|
for (signed long idx = 0;
|
|
idx < 32;
|
|
idx++) {
|
|
id v = Cache7527292[idx];
|
|
if (v && OSAtomicCompareAndSwapPtrBarrier(v, ((void*)0), (void * volatile *)(Cache7527292 + idx))) {
|
|
}
|
|
}
|
|
}
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// <rdar://problem/7515938> - Handle initialization of incomplete arrays
|
|
// in structures using a compound value. Previously this crashed.
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
struct rdar_7515938 {
|
|
int x;
|
|
int y[];
|
|
};
|
|
|
|
const struct rdar_7515938 *rdar_7515938() {
|
|
static const struct rdar_7515938 z = { 0, { 1, 2 } };
|
|
if (z.y[0] != 1) {
|
|
int *p = 0;
|
|
*p = 0xDEADBEEF; // no-warning
|
|
}
|
|
return &z;
|
|
}
|
|
|
|
struct rdar_7515938_str {
|
|
int x;
|
|
char y[];
|
|
};
|
|
|
|
const struct rdar_7515938_str *rdar_7515938_str() {
|
|
static const struct rdar_7515938_str z = { 0, "hello" };
|
|
return &z;
|
|
}
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// Assorted test cases from PR 4172.
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
struct PR4172A_s { int *a; };
|
|
|
|
void PR4172A_f2(struct PR4172A_s *p);
|
|
|
|
int PR4172A_f1(void) {
|
|
struct PR4172A_s m;
|
|
int b[4];
|
|
m.a = b;
|
|
PR4172A_f2(&m);
|
|
return b[3]; // no-warning
|
|
}
|
|
|
|
struct PR4172B_s { int *a; };
|
|
|
|
void PR4172B_f2(struct PR4172B_s *p);
|
|
|
|
int PR4172B_f1(void) {
|
|
struct PR4172B_s m;
|
|
int x;
|
|
m.a = &x;
|
|
PR4172B_f2(&m);
|
|
return x; // no-warning
|
|
}
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// Test invalidation of values in struct literals.
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
struct s_rev96062 { int *x; int *y; };
|
|
struct s_rev96062_nested { struct s_rev96062 z; };
|
|
|
|
void test_a_rev96062_aux(struct s_rev96062 *s);
|
|
void test_a_rev96062_aux2(struct s_rev96062_nested *s);
|
|
|
|
int test_a_rev96062() {
|
|
int a, b;
|
|
struct s_rev96062 x = { &a, &b };
|
|
test_a_rev96062_aux(&x);
|
|
return a + b; // no-warning
|
|
}
|
|
int test_b_rev96062() {
|
|
int a, b;
|
|
struct s_rev96062 x = { &a, &b };
|
|
struct s_rev96062 z = x;
|
|
test_a_rev96062_aux(&z);
|
|
return a + b; // no-warning
|
|
}
|
|
int test_c_rev96062() {
|
|
int a, b;
|
|
struct s_rev96062 x = { &a, &b };
|
|
struct s_rev96062_nested w = { x };
|
|
struct s_rev96062_nested z = w;
|
|
test_a_rev96062_aux2(&z);
|
|
return a + b; // no-warning
|
|
}
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// <rdar://problem/7242010> - The access to y[0] at the bottom previously
|
|
// was reported as an uninitialized value.
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
char *rdar_7242010(int count, char **y) {
|
|
char **x = alloca((count + 4) * sizeof(*x));
|
|
x[0] = "hi";
|
|
x[1] = "there";
|
|
x[2] = "every";
|
|
x[3] = "body";
|
|
memcpy(x + 4, y, count * sizeof(*x));
|
|
y = x;
|
|
return y[0]; // no-warning
|
|
}
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// <rdar://problem/7770737>
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
struct rdar_7770737_s { intptr_t p; };
|
|
void rdar_7770737_aux(struct rdar_7770737_s *p);
|
|
int rdar_7770737(void)
|
|
{
|
|
int x;
|
|
|
|
// Previously 'f' was not properly invalidated, causing the use of
|
|
// an uninitailized value below.
|
|
struct rdar_7770737_s f = { .p = (intptr_t)&x };
|
|
rdar_7770737_aux(&f);
|
|
return x; // no-warning
|
|
}
|
|
int rdar_7770737_pos(void)
|
|
{
|
|
int x;
|
|
struct rdar_7770737_s f = { .p = (intptr_t)&x };
|
|
return x; // expected-warning{{Undefined or garbage value returned to caller}}
|
|
}
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// Test handling of the implicit 'isa' field. For now we don't do anything
|
|
// interesting.
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
void pr6302(id x, Class y) {
|
|
// This previously crashed the analyzer (reported in PR 6302)
|
|
x->isa = y; // expected-warning {{assignment to Objective-C's isa is deprecated in favor of object_setClass()}}
|
|
}
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// Specially handle global variables that are declared constant. In the
|
|
// example below, this forces the loop to take exactly 2 iterations.
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
const int pr6288_L_N = 2;
|
|
void pr6288_(void) {
|
|
int x[2];
|
|
int *px[2];
|
|
int i;
|
|
for (i = 0; i < pr6288_L_N; i++)
|
|
px[i] = &x[i];
|
|
*(px[0]) = 0; // no-warning
|
|
}
|
|
|
|
void pr6288_pos(int z) {
|
|
int x[2];
|
|
int *px[2];
|
|
int i;
|
|
for (i = 0; i < z; i++)
|
|
px[i] = &x[i]; // expected-warning{{Access out-of-bound array element (buffer overflow)}}
|
|
*(px[0]) = 0; // expected-warning{{Dereference of undefined pointer value}}
|
|
}
|
|
|
|
void pr6288_b(void) {
|
|
const int L_N = 2;
|
|
int x[2];
|
|
int *px[2];
|
|
int i;
|
|
for (i = 0; i < L_N; i++)
|
|
px[i] = &x[i];
|
|
*(px[0]) = 0; // no-warning
|
|
}
|
|
|
|
// <rdar://problem/7817800> - A bug in RemoveDeadBindings was causing instance variable bindings
|
|
// to get prematurely pruned from the state.
|
|
@interface Rdar7817800 {
|
|
char *x;
|
|
}
|
|
- (void) rdar7817800_baz;
|
|
@end
|
|
|
|
char *rdar7817800_foobar();
|
|
void rdar7817800_qux(void*);
|
|
|
|
@implementation Rdar7817800
|
|
- (void) rdar7817800_baz {
|
|
if (x)
|
|
rdar7817800_qux(x);
|
|
x = rdar7817800_foobar();
|
|
// Previously this triggered a bogus null dereference warning.
|
|
x[1] = 'a'; // no-warning
|
|
}
|
|
@end
|
|
|
|
// PR 6036 - This test case triggered a crash inside StoreManager::CastRegion because the size
|
|
// of 'unsigned long (*)[0]' is 0.
|
|
struct pr6036_a { int pr6036_b; };
|
|
struct pr6036_c;
|
|
void u132monitk (struct pr6036_c *pr6036_d) {
|
|
(void) ((struct pr6036_a *) (unsigned long (*)[0]) ((char *) pr6036_d - 1))->pr6036_b; // expected-warning{{Casting a non-structure type to a structure type and accessing a field can lead to memory access errors or data corruption}}
|
|
}
|
|
|
|
// <rdar://problem/7813989> - ?-expressions used as a base of a member expression should be treated as an lvalue
|
|
typedef struct rdar7813989_NestedVal { int w; } rdar7813989_NestedVal;
|
|
typedef struct rdar7813989_Val { rdar7813989_NestedVal nv; } rdar7813989_Val;
|
|
|
|
int rdar7813989(int x, rdar7813989_Val *a, rdar7813989_Val *b) {
|
|
// This previously crashed with an assertion failure.
|
|
int z = (x ? a->nv : b->nv).w;
|
|
return z + 1;
|
|
}
|
|
|
|
// PR 6844 - Don't crash on vaarg expression.
|
|
typedef __builtin_va_list va_list;
|
|
void map(int srcID, ...) {
|
|
va_list ap;
|
|
int i;
|
|
for (i = 0; i < srcID; i++) {
|
|
int v = __builtin_va_arg(ap, int);
|
|
}
|
|
}
|
|
|
|
// PR 6854 - crash when casting symbolic memory address to a float
|
|
// Handle casting from a symbolic region to a 'float'. This isn't
|
|
// really all that intelligent, but previously this caused a crash
|
|
// in SimpleSValuator.
|
|
void pr6854(void * arg) {
|
|
void * a = arg;
|
|
*(void**)a = arg;
|
|
float f = *(float*) a;
|
|
}
|
|
|
|
// <rdar://problem/8032791> False positive due to symbolic store not find
|
|
// value because of 'const' qualifier
|
|
double rdar_8032791_2();
|
|
double rdar_8032791_1() {
|
|
struct R8032791 { double x[2]; double y; }
|
|
data[3] = {
|
|
{{1.0, 3.0}, 3.0}, // 1 2 3
|
|
{{1.0, 1.0}, 0.0}, // 1 1 2 2 3 3
|
|
{{1.0, 3.0}, 1.0} // 1 2 3
|
|
};
|
|
|
|
double x = 0.0;
|
|
for (unsigned i = 0 ; i < 3; i++) {
|
|
const struct R8032791 *p = &data[i];
|
|
x += p->y + rdar_8032791_2(); // no-warning
|
|
}
|
|
return x;
|
|
}
|
|
|
|
// PR 7450 - Handle pointer arithmetic with __builtin_alloca
|
|
void pr_7450_aux(void *x);
|
|
void pr_7450() {
|
|
void *p = __builtin_alloca(10);
|
|
// Don't crash when analyzing the following statement.
|
|
pr_7450_aux(p + 8);
|
|
}
|
|
|
|
// <rdar://problem/8243408> - Symbolicate struct values returned by value.
|
|
struct s_rdar_8243408 { int x; };
|
|
extern struct s_rdar_8243408 rdar_8243408_aux(void);
|
|
void rdar_8243408(void) {
|
|
struct s_rdar_8243408 a = { 1 }, *b = 0;
|
|
while (a.x && !b)
|
|
a = rdar_8243408_aux();
|
|
|
|
// Previously there was a false error here with 'b' being null.
|
|
(void) (a.x && b->x); // no-warning
|
|
|
|
// Introduce a null deref to ensure we are checking this path.
|
|
int *p = 0;
|
|
*p = 0xDEADBEEF; // expected-warning{{Dereference of null pointer}}
|
|
}
|
|
|
|
// <rdar://problem/8258814>
|
|
int r8258814()
|
|
{
|
|
int foo;
|
|
int * a = &foo;
|
|
a[0] = 10;
|
|
// Do not warn that the value of 'foo' is uninitialized.
|
|
return foo; // no-warning
|
|
}
|
|
|
|
// PR 8052 - Don't crash when reasoning about loads from a function address.\n
|
|
typedef unsigned int __uint32_t;
|
|
typedef unsigned long vm_offset_t;
|
|
typedef __uint32_t pd_entry_t;
|
|
typedef unsigned char u_char;
|
|
typedef unsigned int u_int;
|
|
typedef unsigned long u_long;
|
|
extern int bootMP_size;
|
|
void bootMP(void);
|
|
static void
|
|
pr8052(u_int boot_addr)
|
|
{
|
|
int x;
|
|
int size = *(int *) ((u_long) & bootMP_size);
|
|
u_char *src = (u_char *) ((u_long) bootMP);
|
|
u_char *dst = (u_char *) boot_addr + ((vm_offset_t) ((((((((1 <<
|
|
12) / (sizeof(pd_entry_t))) - 1) - 1) - (260 - 2))) << 22) | ((0) << 12)));
|
|
#ifdef TEST_64
|
|
// expected-warning@-3 {{cast to 'u_char *' (aka 'unsigned char *') from smaller integer type 'u_int' (aka 'unsigned int')}}
|
|
#endif
|
|
for (x = 0;
|
|
x < size;
|
|
++x)
|
|
*dst++ = *src++;
|
|
}
|
|
|
|
// PR 8015 - don't return undefined values for arrays when using a valid
|
|
// symbolic index
|
|
int pr8015_A();
|
|
void pr8015_B(const char *);
|
|
|
|
void pr8015_C() {
|
|
int number = pr8015_A();
|
|
const char *numbers[] = { "zero" };
|
|
if (number == 0) {
|
|
pr8015_B(numbers[number]); // no-warning
|
|
}
|
|
}
|
|
|
|
// Tests that we correctly handle that 'number' is perfectly constrained
|
|
// after 'if (nunber == 0)', allowing us to resolve that
|
|
// numbers[number] == numbers[0].
|
|
void pr8015_D_FIXME() {
|
|
int number = pr8015_A();
|
|
const char *numbers[] = { "zero" };
|
|
if (number == 0) {
|
|
if (numbers[number] == numbers[0]) // expected-warning{{Both operands to '==' always have the same value}}
|
|
return;
|
|
// Unreachable.
|
|
int *p = 0;
|
|
*p = 0xDEADBEEF; // no-warnng
|
|
}
|
|
}
|
|
|
|
void pr8015_E() {
|
|
// Similar to pr8015_C, but number is allowed to be a valid range.
|
|
unsigned number = pr8015_A();
|
|
const char *numbers[] = { "zero", "one", "two" };
|
|
if (number < 3) {
|
|
pr8015_B(numbers[number]); // no-warning
|
|
}
|
|
}
|
|
|
|
void pr8015_F_FIXME() {
|
|
// Similar to pr8015_E, but like pr8015_D we check if the pointer
|
|
// is the same as one of the string literals. The null dereference
|
|
// here is not feasible in practice, so this is a false positive.
|
|
int number = pr8015_A();
|
|
const char *numbers[] = { "zero", "one", "two" };
|
|
if (number < 3) {
|
|
const char *p = numbers[number];
|
|
if (p == numbers[0] || p == numbers[1] || p == numbers[2])
|
|
return;
|
|
int *q = 0;
|
|
*q = 0xDEADBEEF; // expected-warning{{Dereference of null pointer}}
|
|
}
|
|
}
|
|
|
|
// PR 8141. Previously the statement expression in the for loop caused
|
|
// the CFG builder to crash.
|
|
struct list_pr8141
|
|
{
|
|
struct list_pr8141 *tail;
|
|
};
|
|
|
|
struct list_pr8141 *
|
|
pr8141 (void) {
|
|
struct list_pr8141 *items;
|
|
for (;; items = ({ do { } while (0); items->tail; })) // expected-warning{{Dereference of undefined pointer value}}
|
|
{
|
|
}
|
|
}
|
|
|
|
// Don't crash when building the CFG.
|
|
void do_not_crash(int x) {
|
|
while (x - ({do {} while (0); x; })) {
|
|
}
|
|
}
|
|
|
|
// <rdar://problem/8424269> - Handle looking at the size of a VLA in
|
|
// ArrayBoundChecker. Nothing intelligent (yet); just don't crash.
|
|
typedef struct RDar8424269_A {
|
|
int RDar8424269_C;
|
|
} RDar8424269_A;
|
|
static void RDar8424269_B(RDar8424269_A *p, unsigned char *RDar8424269_D,
|
|
const unsigned char *RDar8424269_E, int RDar8424269_F,
|
|
int b_w, int b_h, int dx, int dy) {
|
|
int x, y, b, r, l;
|
|
unsigned char tmp2t[3][RDar8424269_F * (32 + 8)];
|
|
unsigned char *tmp2 = tmp2t[0];
|
|
if (p && !p->RDar8424269_C)
|
|
b = 15;
|
|
tmp2 = tmp2t[1];
|
|
if (b & 2) { // expected-warning{{The left operand of '&' is a garbage value}}
|
|
for (y = 0; y < b_h; y++) {
|
|
for (x = 0; x < b_w + 1; x++) {
|
|
int am = 0;
|
|
tmp2[x] = am;
|
|
}
|
|
}
|
|
}
|
|
tmp2 = tmp2t[2];
|
|
}
|
|
|
|
// <rdar://problem/8642434> - Handle transparent unions with the NonNullParamChecker.
|
|
typedef union {
|
|
struct rdar_8642434_typeA *_dq;
|
|
}
|
|
rdar_8642434_typeB __attribute__((transparent_union));
|
|
|
|
__attribute__((visibility("default"))) __attribute__((__nonnull__)) __attribute__((__nothrow__))
|
|
void rdar_8642434_funcA(rdar_8642434_typeB object);
|
|
|
|
void rdar_8642434_funcB(struct rdar_8642434_typeA *x, struct rdar_8642434_typeA *y) {
|
|
rdar_8642434_funcA(x);
|
|
if (!y)
|
|
rdar_8642434_funcA(y); // expected-warning{{Null pointer passed as an argument to a 'nonnull' parameter}}
|
|
}
|
|
|
|
// <rdar://problem/8848957> - Handle loads and stores from a symbolic index
|
|
// into array without warning about an uninitialized value being returned.
|
|
// While RegionStore can't fully reason about this example, it shouldn't
|
|
// warn here either.
|
|
typedef struct s_test_rdar8848957 {
|
|
int x, y, z;
|
|
} s_test_rdar8848957;
|
|
|
|
s_test_rdar8848957 foo_rdar8848957();
|
|
int rdar8848957(int index) {
|
|
s_test_rdar8848957 vals[10];
|
|
vals[index] = foo_rdar8848957();
|
|
return vals[index].x; // no-warning
|
|
}
|
|
|
|
// PR 9049 - crash on symbolicating unions. This test exists solely to
|
|
// test that the analyzer doesn't crash.
|
|
typedef struct pr9048_cdev *pr9048_cdev_t;
|
|
typedef union pr9048_abstracted_disklabel { void *opaque; } pr9048_disklabel_t;
|
|
struct pr9048_diskslice { pr9048_disklabel_t ds_label; };
|
|
struct pr9048_diskslices {
|
|
int dss_secmult;
|
|
struct pr9048_diskslice dss_slices[16];
|
|
};
|
|
void pr9048(pr9048_cdev_t dev, struct pr9048_diskslices * ssp, unsigned int slice)
|
|
{
|
|
pr9048_disklabel_t lp;
|
|
struct pr9048_diskslice *sp;
|
|
sp = &ssp->dss_slices[slice];
|
|
if (ssp->dss_secmult == 1) {
|
|
} else if ((lp = sp->ds_label).opaque != ((void *) 0)) {
|
|
}
|
|
}
|
|
|
|
// Test Store reference counting in the presence of Lazy compound values.
|
|
// This previously caused an infinite recursion.
|
|
typedef struct {} Rdar_9103310_A;
|
|
typedef struct Rdar_9103310_B Rdar_9103310_B_t;
|
|
struct Rdar_9103310_B {
|
|
unsigned char Rdar_9103310_C[101];
|
|
};
|
|
void Rdar_9103310_E(Rdar_9103310_A * x, struct Rdar_9103310_C * b) { // expected-warning {{declaration of 'struct Rdar_9103310_C' will not be visible outside of this function}}
|
|
char Rdar_9103310_D[4][4] = { "a", "b", "c", "d"};
|
|
int i;
|
|
Rdar_9103310_B_t *y = (Rdar_9103310_B_t *) x;
|
|
for (i = 0; i < 101; i++) {
|
|
Rdar_9103310_F(b, "%2d%s ", (y->Rdar_9103310_C[i]) / 4, Rdar_9103310_D[(y->Rdar_9103310_C[i]) % 4]); // expected-warning {{implicit declaration of function 'Rdar_9103310_F' is invalid in C99}}
|
|
}
|
|
}
|
|
|
|
// Test handling binding lazy compound values to a region and then have
|
|
// specific elements have other bindings.
|
|
int PR9455() {
|
|
char arr[4] = "000";
|
|
arr[0] = '1';
|
|
if (arr[1] == '0')
|
|
return 1;
|
|
int *p = 0;
|
|
*p = 0xDEADBEEF; // no-warning
|
|
return 1;
|
|
}
|
|
int PR9455_2() {
|
|
char arr[4] = "000";
|
|
arr[0] = '1';
|
|
if (arr[1] == '0') {
|
|
int *p = 0;
|
|
*p = 0xDEADBEEF; // expected-warning {{null}}
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
// Test initialization of substructs via lazy compound values.
|
|
typedef float RDar9163742_Float;
|
|
|
|
typedef struct {
|
|
RDar9163742_Float x, y;
|
|
} RDar9163742_Point;
|
|
typedef struct {
|
|
RDar9163742_Float width, height;
|
|
} RDar9163742_Size;
|
|
typedef struct {
|
|
RDar9163742_Point origin;
|
|
RDar9163742_Size size;
|
|
} RDar9163742_Rect;
|
|
|
|
extern RDar9163742_Rect RDar9163742_RectIntegral(RDar9163742_Rect);
|
|
|
|
RDar9163742_Rect RDar9163742_IntegralRect(RDar9163742_Rect frame)
|
|
{
|
|
RDar9163742_Rect integralFrame;
|
|
integralFrame.origin.x = frame.origin.x;
|
|
integralFrame.origin.y = frame.origin.y;
|
|
integralFrame.size = frame.size;
|
|
return RDar9163742_RectIntegral(integralFrame); // no-warning; all fields initialized
|
|
}
|
|
|
|
// Test correct handling of prefix '--' operator.
|
|
void rdar9444714() {
|
|
int x;
|
|
char str[ 32 ];
|
|
char buf[ 32 ];
|
|
char * dst;
|
|
char * ptr;
|
|
|
|
x = 1234;
|
|
dst = str;
|
|
ptr = buf;
|
|
do
|
|
{
|
|
*ptr++ = (char)( '0' + ( x % 10 ) );
|
|
x /= 10;
|
|
} while( x > 0 );
|
|
|
|
while( ptr > buf )
|
|
{
|
|
*dst++ = *( --( ptr ) ); // no-warning
|
|
}
|
|
*dst = '\0';
|
|
}
|
|
|
|
// Test handling symbolic elements with field accesses.
|
|
// <rdar://problem/11127008>
|
|
typedef struct {
|
|
unsigned value;
|
|
} RDar11127008;
|
|
|
|
signed rdar_11127008_index();
|
|
|
|
static unsigned rdar_11127008(void) {
|
|
RDar11127008 values[] = {{.value = 0}, {.value = 1}};
|
|
signed index = rdar_11127008_index();
|
|
if (index < 0) return 0;
|
|
if (index >= 2) return 0;
|
|
return values[index].value;
|
|
}
|
|
|
|
// Test handling invalidating arrays passed to a block via captured
|
|
// pointer value (not a __block variable).
|
|
typedef void (^radar11125868_cb)(int *, unsigned);
|
|
|
|
void rdar11125868_aux(radar11125868_cb cb);
|
|
|
|
int rdar11125868() {
|
|
int integersStackArray[1];
|
|
int *integers = integersStackArray;
|
|
rdar11125868_aux(^(int *integerValue, unsigned index) {
|
|
integers[index] = integerValue[index];
|
|
});
|
|
return integers[0] == 0; // no-warning
|
|
}
|
|
|
|
int rdar11125868_positive() {
|
|
int integersStackArray[1];
|
|
int *integers = integersStackArray;
|
|
return integers[0] == 0; // expected-warning {{he left operand of '==' is a}}
|
|
}
|