From 222e2a7620e6520ffaf4fc4e69d79c18da31542e Mon Sep 17 00:00:00 2001 From: "Zancanaro; Carlo" Date: Mon, 24 Sep 2012 09:58:17 +1000 Subject: Add the clang library to the repo (with some of my changes, too). --- clang/test/Analysis/misc-ps-64.m | 47 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 47 insertions(+) create mode 100644 clang/test/Analysis/misc-ps-64.m (limited to 'clang/test/Analysis/misc-ps-64.m') diff --git a/clang/test/Analysis/misc-ps-64.m b/clang/test/Analysis/misc-ps-64.m new file mode 100644 index 0000000..e20a27f --- /dev/null +++ b/clang/test/Analysis/misc-ps-64.m @@ -0,0 +1,47 @@ +// RUN: %clang_cc1 -triple x86_64-apple-darwin9 -analyze -analyzer-checker=core,experimental.core -analyzer-store=region -analyzer-constraints=basic -verify -fblocks %s +// RUN: %clang_cc1 -triple x86_64-apple-darwin9 -analyze -analyzer-checker=core,experimental.core -analyzer-store=region -analyzer-constraints=range -verify -fblocks %s + +// - 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); +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); +} + +// - 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); + } +} -- cgit v1.2.3