// RUN: %clang_analyze_cc1 -analyzer-checker=core,unix.Malloc,debug.ExprInspection -analyzer-output=text -verify %s
typedef unsigned int NSUInteger;
typedef __typeof__(sizeof(int)) size_t;
void *malloc(size_t);
void *calloc(size_t nmemb, size_t size);
void free(void *);
void clang_analyzer_eval(int);
struct s {
int data;
};
struct s global;
void g(int);
void f4(void) {
int a;
if (global.data == 0)
a = 3;
if (global.data == 0) // When the true branch is feasible 'a = 3'.
g(a); // no-warning
}
// Test uninitialized value due to part of the structure being uninitialized.
struct TestUninit { int x; int y; };
struct TestUninit test_uninit_aux(void);
void test_unit_aux2(int);
void test_uninit_pos(void) {
struct TestUninit v1 = { 0, 0 };
struct TestUninit v2 = test_uninit_aux();
int z; // expected-note{{'z' declared without an initial value}}
v1.y = z; // expected-warning{{Assigned value is garbage or undefined}}
// expected-note@-1{{Assigned value is garbage or undefined}}
test_unit_aux2(v2.x + v1.y);
}
void test_uninit_pos_2(void) {
struct TestUninit v1 = { 0, 0 };
struct TestUninit v2;
test_unit_aux2(v2.x + v1.y); // expected-warning{{The left operand of '+' is a garbage value}}
// expected-note@-1{{The left operand of '+' is a garbage value}}
}
void test_uninit_pos_3(void) {
struct TestUninit v1 = { 0, 0 };
struct TestUninit v2;
test_unit_aux2(v1.y + v2.x); // expected-warning{{The right operand of '+' is a garbage value}}
// expected-note@-1{{The right operand of '+' is a garbage value}}
}
void test_uninit_neg(void) {
struct TestUninit v1 = { 0, 0 };
struct TestUninit v2 = test_uninit_aux();
test_unit_aux2(v2.x + v1.y);
}
extern void test_uninit_struct_arg_aux(struct TestUninit arg);
void test_uninit_struct_arg(void) {
struct TestUninit x; // expected-note{{'x' initialized here}}
test_uninit_struct_arg_aux(x); // expected-warning{{Passed-by-value struct argument contains uninitialized data (e.g., field: 'x')}}
// expected-note@-1{{Passed-by-value struct argument contains uninitialized data (e.g., field: 'x')}}
}
@interface Foo
- (void) passVal:(struct TestUninit)arg;
@end
void testFoo(Foo *o) {
struct TestUninit x; // expected-note{{'x' initialized here}}
[o passVal:x]; // expected-warning{{Passed-by-value struct argument contains uninitialized data (e.g., field: 'x')}}
// expected-note@-1{{Passed-by-value struct argument contains uninitialized data (e.g., field: 'x')}}
}
// Test case shows an uninitialized value being used in the LHS of a compound
// assignment.
void rdar_7780304(void) {
typedef struct s_r7780304 { int x; } s_r7780304;
s_r7780304 b;
b.x |= 1; // expected-warning{{The left expression of the compound assignment is an uninitialized value. The computed value will also be garbage}}
// expected-note@-1{{The left expression of the compound assignment is an uninitialized value. The computed value will also be garbage}}
}
// The flip side of PR10163 -- float arrays that are actually uninitialized
void test_PR10163(float);
void PR10163 (void) {
float x[2];
test_PR10163(x[1]); // expected-warning{{uninitialized value}}
// expected-note@-1{{1st function call argument is an uninitialized value}}
}
// PR10163 -- don't warn for default-initialized float arrays.
void PR10163_default_initialized_arrays(void) {
float x[2] = {0};
test_PR10163(x[1]); // no-warning
}
struct MyStr {
int x;
int y;
};
void swap(struct MyStr *To, struct MyStr *From) {
// This is not really a swap but close enough for our test.
To->x = From->x;
To->y = From->y; // expected-note{{Uninitialized value stored to field 'y'}}
}
int test_undefined_member_assignment_in_swap(struct MyStr *s2) {
struct MyStr s1;
s1.x = 5;
swap(s2, &s1); // expected-note{{Calling 'swap'}}
// expected-note@-1{{Returning from 'swap'}}
return s2->y; // expected-warning{{Undefined or garbage value returned to caller}}
// expected-note@-1{{Undefined or garbage value returned to caller}}
}
@interface A
- (NSUInteger)foo;
@end
NSUInteger f8(A* x){
const NSUInteger n = [x foo];
int* bogus;
if (n > 0) { // tests const cast transfer function logic
NSUInteger i;
for (i = 0; i < n; ++i)
bogus = 0;
if (bogus) // no-warning
return n+1;
}
return n;
}
typedef struct {
float x;
float y;
float z;
} Point;
typedef struct {
Point origin;
int size;
} Circle;
Point makePoint(float x, float y) {
Point result;
result.x = x;
result.y = y;
result.z = 0.0;
return result;
}
void PR14765_test(void) {
Circle *testObj = calloc(1, sizeof(Circle));
clang_analyzer_eval(testObj->size == 0); // expected-warning{{TRUE}}
// expected-note@-1{{TRUE}}
testObj->origin = makePoint(0.0, 0.0);
if (testObj->size > 0) { ; } // expected-note{{Assuming field 'size' is <= 0}}
// expected-note@-1{{Taking false branch}}
// FIXME: Assigning to 'testObj->origin' kills the default binding for the
// whole region, meaning that we've forgotten that testObj->size should also
// default to 0.
// This should be TRUE.
clang_analyzer_eval(testObj->size == 0); // expected-warning{{UNKNOWN}}
// expected-note@-1{{UNKNOWN}}
free(testObj);
}
void PR14765_argument(Circle *testObj) {
int oldSize = testObj->size;
clang_analyzer_eval(testObj->size == oldSize); // expected-warning{{TRUE}}
// expected-note@-1{{TRUE}}
testObj->origin = makePoint(0.0, 0.0);
clang_analyzer_eval(testObj->size == oldSize); // expected-warning{{TRUE}}
// expected-note@-1{{TRUE}}
}
typedef struct {
int x;
int y;
int z;
} IntPoint;
typedef struct {
IntPoint origin;
int size;
} IntCircle;
IntPoint makeIntPoint(int x, int y) {
IntPoint result;
result.x = x;
result.y = y;
result.z = 0;
return result;
}
void PR14765_test_int(void) {
IntCircle *testObj = calloc(1, sizeof(IntCircle));
clang_analyzer_eval(testObj->size == 0); // expected-warning{{TRUE}}
// expected-note@-1{{TRUE}}
clang_analyzer_eval(testObj->origin.x == 0); // expected-warning{{TRUE}}
// expected-note@-1{{TRUE}}
clang_analyzer_eval(testObj->origin.y == 0); // expected-warning{{TRUE}}
// expected-note@-1{{TRUE}}
clang_analyzer_eval(testObj->origin.z == 0); // expected-warning{{TRUE}}
// expected-note@-1{{TRUE}}
testObj->origin = makeIntPoint(1, 2);
if (testObj->size > 0) { ; } // expected-note{{Assuming field 'size' is <= 0}}
// expected-note@-1{{Taking false branch}}
// expected-note@-2{{Assuming field 'size' is <= 0}}
// expected-note@-3{{Taking false branch}}
// expected-note@-4{{Assuming field 'size' is <= 0}}
// expected-note@-5{{Taking false branch}}
// expected-note@-6{{Assuming field 'size' is <= 0}}
// expected-note@-7{{Taking false branch}}
// FIXME: Assigning to 'testObj->origin' kills the default binding for the
// whole region, meaning that we've forgotten that testObj->size should also
// default to 0.
// This should be TRUE.
clang_analyzer_eval(testObj->size == 0); // expected-warning{{UNKNOWN}}
// expected-note@-1{{UNKNOWN}}
clang_analyzer_eval(testObj->origin.x == 1); // expected-warning{{TRUE}}
// expected-note@-1{{TRUE}}
clang_analyzer_eval(testObj->origin.y == 2); // expected-warning{{TRUE}}
// expected-note@-1{{TRUE}}
clang_analyzer_eval(testObj->origin.z == 0); // expected-warning{{TRUE}}
// expected-note@-1{{TRUE}}
free(testObj);
}
void PR14765_argument_int(IntCircle *testObj) {
int oldSize = testObj->size;
clang_analyzer_eval(testObj->size == oldSize); // expected-warning{{TRUE}}
// expected-note@-1{{TRUE}}
testObj->origin = makeIntPoint(1, 2);
clang_analyzer_eval(testObj->size == oldSize); // expected-warning{{TRUE}}
// expected-note@-1{{TRUE}}
clang_analyzer_eval(testObj->origin.x == 1); // expected-warning{{TRUE}}
// expected-note@-1{{TRUE}}
clang_analyzer_eval(testObj->origin.y == 2); // expected-warning{{TRUE}}
// expected-note@-1{{TRUE}}
clang_analyzer_eval(testObj->origin.z == 0); // expected-warning{{TRUE}}
// expected-note@-1{{TRUE}}
}
void rdar13292559(Circle input) {
extern void useCircle(Circle);
Circle obj = input;
useCircle(obj); // no-warning
// This generated an "uninitialized 'size' field" warning for a (short) while.
obj.origin = makePoint(0.0, 0.0);
useCircle(obj); // no-warning
}
typedef struct {
int x;
int y;
} IntPoint2D;
typedef struct {
IntPoint2D origin;
int size;
} IntCircle2D;
IntPoint2D makeIntPoint2D(int x, int y) {
IntPoint2D result;
result.x = x;
result.y = y;
return result;
}
void testSmallStructsCopiedPerField(void) {
IntPoint2D a;
a.x = 0;
IntPoint2D b = a;
extern void useInt(int);
useInt(b.x); // no-warning
useInt(b.y); // expected-warning{{uninitialized}}
// expected-note@-1{{uninitialized}}
}
void testLargeStructsNotCopiedPerField(void) {
IntPoint a;
a.x = 0;
IntPoint b = a;
extern void useInt(int);
useInt(b.x); // no-warning
useInt(b.y); // no-warning
}
void testSmallStructInLargerStruct(void) {
IntCircle2D *testObj = calloc(1, sizeof(IntCircle2D));
clang_analyzer_eval(testObj->size == 0); // expected-warning{{TRUE}}
// expected-note@-1{{TRUE}}
clang_analyzer_eval(testObj->origin.x == 0); // expected-warning{{TRUE}}
// expected-note@-1{{TRUE}}
clang_analyzer_eval(testObj->origin.y == 0); // expected-warning{{TRUE}}
// expected-note@-1{{TRUE}}
testObj->origin = makeIntPoint2D(1, 2);
if (testObj->size > 0) { ; } // expected-note{{Field 'size' is <= 0}}
// expected-note@-1{{Taking false branch}}
// expected-note@-2{{Field 'size' is <= 0}}
// expected-note@-3{{Taking false branch}}
// expected-note@-4{{Field 'size' is <= 0}}
// expected-note@-5{{Taking false branch}}
clang_analyzer_eval(testObj->size == 0); // expected-warning{{TRUE}}
// expected-note@-1{{TRUE}}
clang_analyzer_eval(testObj->origin.x == 1); // expected-warning{{TRUE}}
// expected-note@-1{{TRUE}}
clang_analyzer_eval(testObj->origin.y == 2); // expected-warning{{TRUE}}
// expected-note@-1{{TRUE}}
free(testObj);
}
void testCopySmallStructIntoArgument(IntCircle2D *testObj) {
int oldSize = testObj->size;
clang_analyzer_eval(testObj->size == oldSize); // expected-warning{{TRUE}}
// expected-note@-1{{TRUE}}
testObj->origin = makeIntPoint2D(1, 2);
clang_analyzer_eval(testObj->size == oldSize); // expected-warning{{TRUE}}
// expected-note@-1{{TRUE}}
clang_analyzer_eval(testObj->origin.x == 1); // expected-warning{{TRUE}}
// expected-note@-1{{TRUE}}
clang_analyzer_eval(testObj->origin.y == 2); // expected-warning{{TRUE}}
// expected-note@-1{{TRUE}}
}
void testSmallStructBitfields(void) {
struct {
int x : 4;
int y : 4;
} a, b;
a.x = 1;
a.y = 2;
b = a;
clang_analyzer_eval(b.x == 1); // expected-warning{{TRUE}}
// expected-note@-1{{TRUE}}
clang_analyzer_eval(b.y == 2); // expected-warning{{TRUE}}
// expected-note@-1{{TRUE}}
}
void testSmallStructBitfieldsFirstUndef(void) {
struct {
int x : 4;
int y : 4;
} a, b;
a.y = 2;
b = a;
clang_analyzer_eval(b.y == 2); // expected-warning{{TRUE}}
// expected-note@-1{{TRUE}}
clang_analyzer_eval(b.x == 1); // expected-warning{{garbage}}
// expected-note@-1{{garbage}}
}
void testSmallStructBitfieldsSecondUndef(void) {
struct {
int x : 4;
int y : 4;
} a, b;
a.x = 1;
b = a;
clang_analyzer_eval(b.x == 1); // expected-warning{{TRUE}}
// expected-note@-1{{TRUE}}
clang_analyzer_eval(b.y == 2); // expected-warning{{garbage}}
// expected-note@-1{{garbage}}
}
void testSmallStructBitfieldsFirstUnnamed(void) {
struct {
int : 4;
int y : 4;
} a, b, c; // expected-note{{'c' initialized here}}
a.y = 2;
b = a;
clang_analyzer_eval(b.y == 2); // expected-warning{{TRUE}}
// expected-note@-1{{TRUE}}
b = c; // expected-note{{Uninitialized value stored to 'b.y'}}
clang_analyzer_eval(b.y == 2); // expected-warning{{garbage}}
// expected-note@-1{{garbage}}
}
void testSmallStructBitfieldsSecondUnnamed(void) {
struct {
int x : 4;
int : 4;
} a, b, c; // expected-note{{'c' initialized here}}
a.x = 1;
b = a;
clang_analyzer_eval(b.x == 1); // expected-warning{{TRUE}}
// expected-note@-1{{TRUE}}
b = c; // expected-note{{Uninitialized value stored to 'b.x'}}
clang_analyzer_eval(b.x == 1); // expected-warning{{garbage}}
// expected-note@-1{{garbage}}
}
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