7068aa9841
Clang has traditionally allowed C programs to implicitly convert integers to pointers and pointers to integers, despite it not being valid to do so except under special circumstances (like converting the integer 0, which is the null pointer constant, to a pointer). In C89, this would result in undefined behavior per 3.3.4, and in C99 this rule was strengthened to be a constraint violation instead. Constraint violations are most often handled as an error. This patch changes the warning to default to an error in all C modes (it is already an error in C++). This gives us better security posture by calling out potential programmer mistakes in code but still allows users who need this behavior to use -Wno-error=int-conversion to retain the warning behavior, or -Wno-int-conversion to silence the diagnostic entirely. Differential Revision: https://reviews.llvm.org/D129881
113 lines
6.7 KiB
Objective-C
113 lines
6.7 KiB
Objective-C
// RUN: %clang_analyze_cc1 -triple i386-apple-darwin10 -fblocks -w -Wno-int-conversion -analyzer-checker=osx.NumberObjectConversion %s -verify
|
|
// RUN: %clang_analyze_cc1 -triple i386-apple-darwin10 -fblocks -w -Wno-int-conversion -analyzer-checker=osx.NumberObjectConversion -analyzer-config osx.NumberObjectConversion:Pedantic=true -DPEDANTIC %s -verify
|
|
// RUN: %clang_analyze_cc1 -triple i386-apple-darwin10 -fblocks -fobjc-arc -w -Wno-int-conversion -analyzer-checker=osx.NumberObjectConversion %s -verify
|
|
// RUN: %clang_analyze_cc1 -triple i386-apple-darwin10 -fblocks -fobjc-arc -w -Wno-int-conversion -analyzer-checker=osx.NumberObjectConversion -analyzer-config osx.NumberObjectConversion:Pedantic=true -DPEDANTIC %s -verify
|
|
|
|
#include "Inputs/system-header-simulator-objc.h"
|
|
|
|
void takes_boolean(BOOL);
|
|
void takes_integer(int);
|
|
|
|
void bad(NSNumber *p) {
|
|
#ifdef PEDANTIC
|
|
if (p) {} // expected-warning{{Converting a pointer value of type 'NSNumber *' to a primitive boolean value; instead, either compare the pointer to nil or call -boolValue}}
|
|
if (!p) {} // expected-warning{{Converting a pointer value of type 'NSNumber *' to a primitive boolean value; instead, either compare the pointer to nil or call -boolValue}}
|
|
(!p) ? 1 : 2; // expected-warning{{Converting a pointer value of type 'NSNumber *' to a primitive boolean value; instead, either compare the pointer to nil or call -boolValue}}
|
|
if (p == 0) {} // expected-warning{{Comparing a pointer value of type 'NSNumber *' to a scalar integer value; instead, either compare the pointer to nil or compare the result of calling a method on 'NSNumber *' to get the scalar value}}
|
|
#else
|
|
if (p) {} // no-warning
|
|
if (!p) {} // no-warning
|
|
(!p) ? 1 : 2; // no-warning
|
|
if (p == 0) {} // no-warning
|
|
#endif
|
|
(BOOL)p; // expected-warning{{Converting a pointer value of type 'NSNumber *' to a primitive BOOL value; did you mean to call -boolValue?}}
|
|
if (p > 0) {} // expected-warning{{Comparing a pointer value of type 'NSNumber *' to a scalar integer value; did you mean to compare the result of calling a method on 'NSNumber *' to get the scalar value?}}
|
|
if (p == YES) {} // expected-warning{{Comparing a pointer value of type 'NSNumber *' to a primitive BOOL value; did you mean to compare the result of calling -boolValue?}}
|
|
if (p == NO) {} // expected-warning{{Comparing a pointer value of type 'NSNumber *' to a primitive BOOL value; did you mean to compare the result of calling -boolValue?}}
|
|
BOOL x = p; // expected-warning{{Converting a pointer value of type 'NSNumber *' to a primitive BOOL value; did you mean to call -boolValue?}}
|
|
x = p; // expected-warning{{Converting a pointer value of type 'NSNumber *' to a primitive BOOL value; did you mean to call -boolValue?}}
|
|
x = (p == YES); // expected-warning{{Comparing a pointer value of type 'NSNumber *' to a primitive BOOL value; did you mean to compare the result of calling -boolValue?}}
|
|
if (p == 1) {} // expected-warning{{Comparing a pointer value of type 'NSNumber *' to a scalar integer value; did you mean to compare the result of calling a method on 'NSNumber *' to get the scalar value?}}
|
|
int y = p; // expected-warning{{Converting a pointer value of type 'NSNumber *' to a scalar integer value; did you mean to call a method on 'NSNumber *' to get the scalar value?}}
|
|
y = p; // expected-warning{{Converting a pointer value of type 'NSNumber *' to a scalar integer value; did you mean to call a method on 'NSNumber *' to get the scalar value?}}
|
|
takes_boolean(p); // expected-warning{{Converting a pointer value of type 'NSNumber *' to a primitive BOOL value; did you mean to call -boolValue?}}
|
|
takes_integer(p); // expected-warning{{Converting a pointer value of type 'NSNumber *' to a scalar integer value; did you mean to call a method on 'NSNumber *' to get the scalar value?}}
|
|
takes_boolean(x); // no-warning
|
|
takes_integer(y); // no-warning
|
|
}
|
|
|
|
typedef NSNumber *SugaredNumber;
|
|
void bad_sugared(SugaredNumber p) {
|
|
p == YES; // expected-warning{{Comparing a pointer value of type 'SugaredNumber' to a primitive BOOL value; did you mean to compare the result of calling -boolValue?}}
|
|
}
|
|
|
|
@interface I : NSObject {
|
|
@public
|
|
NSNumber *ivar;
|
|
NSNumber *prop;
|
|
}
|
|
- (NSNumber *)foo;
|
|
@property(copy) NSNumber *prop;
|
|
@end
|
|
|
|
@implementation I
|
|
@synthesize prop;
|
|
@end
|
|
|
|
void bad_ivar(I *i) {
|
|
i->ivar == YES; // expected-warning{{Comparing a pointer value of type 'NSNumber *' to a primitive BOOL value; did you mean to compare the result of calling -boolValue?}}
|
|
i->prop == YES; // expected-warning{{Comparing a pointer value of type 'NSNumber *' to a primitive BOOL value; did you mean to compare the result of calling -boolValue?}}
|
|
[i foo] == YES; // expected-warning{{Comparing a pointer value of type 'NSNumber *' to a primitive BOOL value; did you mean to compare the result of calling -boolValue?}}
|
|
}
|
|
|
|
void good(NSNumber *p) {
|
|
if ([p boolValue] == NO) {} // no-warning
|
|
if ([p boolValue] == YES) {} // no-warning
|
|
BOOL x = [p boolValue]; // no-warning
|
|
}
|
|
|
|
void suppression(NSNumber *p) {
|
|
if (p == NULL) {} // no-warning
|
|
if (p == nil) {} // no-warning
|
|
}
|
|
|
|
// Conversion of a pointer to an intptr_t is fine.
|
|
typedef long intptr_t;
|
|
typedef unsigned long uintptr_t;
|
|
typedef long fintptr_t; // Fake, for testing the regex.
|
|
void test_intptr_t(NSNumber *p) {
|
|
(long)p; // expected-warning{{Converting a pointer value of type 'NSNumber *' to a scalar integer value; did you mean to call a method on 'NSNumber *' to get the scalar value?}}
|
|
(intptr_t)p; // no-warning
|
|
(unsigned long)p; // expected-warning{{Converting a pointer value of type 'NSNumber *' to a scalar integer value; did you mean to call a method on 'NSNumber *' to get the scalar value?}}
|
|
(uintptr_t)p; // no-warning
|
|
(fintptr_t)p; // expected-warning{{Converting a pointer value of type 'NSNumber *' to a scalar integer value; did you mean to call a method on 'NSNumber *' to get the scalar value?}}
|
|
}
|
|
|
|
// Test macro suppressions.
|
|
#define FOO 0
|
|
#define BAR 1
|
|
void test_macro(NSNumber *p) {
|
|
if (p != BAR) {} // expected-warning{{Comparing a pointer value of type 'NSNumber *' to a scalar integer value; did you mean to compare the result of calling a method on 'NSNumber *' to get the scalar value?}}
|
|
#ifdef PEDANTIC
|
|
if (p != FOO) {} // expected-warning{{Comparing a pointer value of type 'NSNumber *' to a scalar integer value; instead, either compare the pointer to nil or compare the result of calling a method on 'NSNumber *' to get the scalar value}}
|
|
#else
|
|
if (p != FOO) {} // no-warning
|
|
#endif
|
|
}
|
|
|
|
#define NULL_INSIDE_MACRO NULL
|
|
void test_NULL_inside_macro(NSNumber *p) {
|
|
#ifdef PEDANTIC
|
|
if (p == NULL_INSIDE_MACRO) {} // no-warning
|
|
#else
|
|
if (p == NULL_INSIDE_MACRO) {} // no-warning
|
|
#endif
|
|
}
|
|
|
|
// Test a different definition of NULL.
|
|
#undef NULL
|
|
#define NULL 0
|
|
void test_non_pointer_NULL(NSNumber *p) {
|
|
if (p == NULL) {} // no-warning
|
|
}
|