http://llvm.org/bugs/show_bug.cgi?id=15836
Bug ID: 15836
Summary: Analyzer doesn't know sizeof(id)==sizeof(NSObject *),
causes false +ve
Product: clang
Version: 3.2
Hardware: PC
OS: All
Status: NEW
Severity: normal
Priority: P
Component: Static Analyzer
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected]
Classification: Unclassified
This is tested with Xcode 4.6.2's analyzer, I haven't had the opportunity to
test with clang trunk yet.
Test case:
#import <Foundation/Foundation.h>
int main(int argc, const char * argv[])
{
@autoreleasepool {
__unsafe_unretained NSObject **objectArray = (__unsafe_unretained
NSObject **)malloc(sizeof(id) * 10);
free(objectArray);
}
return 0;
}
Actual result:
Result of 'malloc' is converted to a pointer of type 'NSObject
*__unsafe_unretained', which is incompatible with sizeof operand type 'id'
Expected result:
There shouldn't be an issue. The type outside the malloc() call is a pointer to
an object of the same size as the type inside the sizeof() macro—a pointer to
an Objective-C object.
Workaround:
change the type inside sizeof to "NSObject *". This suppresses the analyzer
report, which specifically occurs when the analyzer compares 'id' to a typed
ObjC object pointer.
--
You are receiving this mail because:
You are on the CC list for the bug.
_______________________________________________
LLVMbugs mailing list
[email protected]
http://lists.cs.uiuc.edu/mailman/listinfo/llvmbugs
