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Diffstat (limited to 'test/Analysis/misc-ps-64.m')
-rw-r--r-- | test/Analysis/misc-ps-64.m | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/test/Analysis/misc-ps-64.m b/test/Analysis/misc-ps-64.m new file mode 100644 index 0000000..163da4b --- /dev/null +++ b/test/Analysis/misc-ps-64.m @@ -0,0 +1,49 @@ +// RUN: clang-cc -triple x86_64-apple-darwin9 -analyze -checker-cfref --analyzer-store=basic -analyzer-constraints=basic --verify -fblocks %s && +// RUN: clang-cc -triple x86_64-apple-darwin9 -analyze -checker-cfref --analyzer-store=basic -analyzer-constraints=range --verify -fblocks %s && +// RUN: clang-cc -triple x86_64-apple-darwin9 -analyze -checker-cfref --analyzer-store=region -analyzer-constraints=basic --verify -fblocks %s && +// RUN: clang-cc -triple x86_64-apple-darwin9 -analyze -checker-cfref --analyzer-store=region -analyzer-constraints=range --verify -fblocks %s + +// <rdar://problem/6440393> - A bunch of misc. failures involving evaluating +// these expressions and building CFGs. These tests are here to prevent +// regressions. +typedef long long int64_t; +@class NSString, NSDictionary; +typedef long NSInteger; +typedef unsigned long NSUInteger; +typedef unsigned char Boolean; +typedef const struct __CFDictionary * CFDictionaryRef; + +extern Boolean CFDictionaryGetValueIfPresent(CFDictionaryRef theDict, const void *key, const void **value); +static void shazam(NSUInteger i, unsigned char **out); + +void rdar_6440393_1(NSDictionary *dict) { + NSInteger x = 0; + unsigned char buf[10], *bufptr = buf; + if (!CFDictionaryGetValueIfPresent(0, dict, (void *)&x)) + return; + shazam(x, &bufptr); +} + +// <rdar://problem/6845148> - In this example we got a signedness +// mismatch between the literal '0' and the value of 'scrooge'. The +// trick is to have the evaluator convert the literal to an unsigned +// integer when doing a comparison with the pointer. This happens +// because of the transfer function logic of +// OSAtomicCompareAndSwap64Barrier, which doesn't have special casts +// in place to do this for us. +_Bool OSAtomicCompareAndSwap64Barrier( int64_t __oldValue, int64_t __newValue, volatile int64_t *__theValue ); +extern id objc_lookUpClass(const char *name); +void rdar_6845148(id debug_yourself) { + if (!debug_yourself) { + const char *wacky = ((void *)0); + Class scrooge = wacky ? (Class)objc_lookUpClass(wacky) : ((void *)0); + OSAtomicCompareAndSwap64Barrier(0, (int64_t)scrooge, (int64_t*)&debug_yourself); + } +} +void rdar_6845148_b(id debug_yourself) { + if (!debug_yourself) { + const char *wacky = ((void *)0); + Class scrooge = wacky ? (Class)objc_lookUpClass(wacky) : ((void *)0); + OSAtomicCompareAndSwap64Barrier((int64_t)scrooge, 0, (int64_t*)&debug_yourself); + } +} |