151 lines
3.8 KiB
C
151 lines
3.8 KiB
C
// RUN: %clang_cc1 -analyze -analyzer-checker=core -analyzer-store=region -fblocks -verify %s
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struct FPRec {
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void (*my_func)(int * x);
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};
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int bar(int x);
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int f1_a(struct FPRec* foo) {
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int x;
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(*foo->my_func)(&x);
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return bar(x)+1; // no-warning
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}
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int f1_b() {
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int x;
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return bar(x)+1; // expected-warning{{Function call argument is an uninitialized value}}
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}
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int f2() {
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int x;
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if (x+1) // expected-warning{{The left operand of '+' is a garbage value}}
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return 1;
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return 2;
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}
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int f2_b() {
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int x;
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return ((1+x)+2+((x))) + 1 ? 1 : 2; // expected-warning{{The right operand of '+' is a garbage value}}
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}
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int f3(void) {
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int i;
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int *p = &i;
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if (*p > 0) // expected-warning{{The left operand of '>' is a garbage value}}
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return 0;
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else
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return 1;
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}
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void f4_aux(float* x);
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float f4(void) {
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float x;
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f4_aux(&x);
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return x; // no-warning
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}
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struct f5_struct { int x; };
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void f5_aux(struct f5_struct* s);
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int f5(void) {
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struct f5_struct s;
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f5_aux(&s);
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return s.x; // no-warning
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}
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int ret_uninit() {
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int i;
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int *p = &i;
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return *p; // expected-warning{{Undefined or garbage value returned to caller}}
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}
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// <rdar://problem/6451816>
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typedef unsigned char Boolean;
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typedef const struct __CFNumber * CFNumberRef;
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typedef signed long CFIndex;
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typedef CFIndex CFNumberType;
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typedef unsigned long UInt32;
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typedef UInt32 CFStringEncoding;
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typedef const struct __CFString * CFStringRef;
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extern Boolean CFNumberGetValue(CFNumberRef number, CFNumberType theType, void *valuePtr);
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extern CFStringRef CFStringConvertEncodingToIANACharSetName(CFStringEncoding encoding);
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CFStringRef rdar_6451816(CFNumberRef nr) {
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CFStringEncoding encoding;
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// &encoding is casted to void*. This test case tests whether or not
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// we properly invalidate the value of 'encoding'.
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CFNumberGetValue(nr, 9, &encoding);
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return CFStringConvertEncodingToIANACharSetName(encoding); // no-warning
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}
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// PR 4630 - false warning with nonnull attribute
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// This false positive (due to a regression) caused the analyzer to falsely
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// flag a "return of uninitialized value" warning in the first branch due to
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// the nonnull attribute.
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void pr_4630_aux(char *x, int *y) __attribute__ ((nonnull (1)));
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void pr_4630_aux_2(char *x, int *y);
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int pr_4630(char *a, int y) {
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int x;
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if (y) {
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pr_4630_aux(a, &x);
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return x; // no-warning
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}
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else {
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pr_4630_aux_2(a, &x);
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return x; // no-warning
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}
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}
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// PR 4631 - False positive with union initializer
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// Previously the analyzer didn't examine the compound initializers of unions,
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// resulting in some false positives for initializers with side-effects.
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union u_4631 { int a; };
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struct s_4631 { int a; };
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int pr4631_f2(int *p);
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int pr4631_f3(void *q);
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int pr4631_f1(void)
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{
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int x;
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union u_4631 m = { pr4631_f2(&x) };
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pr4631_f3(&m); // tell analyzer that we use m
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return x; // no-warning
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}
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int pr4631_f1_b(void)
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{
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int x;
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struct s_4631 m = { pr4631_f2(&x) };
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pr4631_f3(&m); // tell analyzer that we use m
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return x; // no-warning
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}
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// <rdar://problem/12278788> - FP when returning a void-valued expression from
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// a void function...or block.
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void foo_radar12278788() { return; }
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void test_radar12278788() {
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return foo_radar12278788(); // no-warning
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}
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void foo_radar12278788_fp() { return; }
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typedef int (*RetIntFuncType)();
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typedef void (*RetVoidFuncType)();
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int test_radar12278788_FP() {
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RetVoidFuncType f = foo_radar12278788_fp;
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return ((RetIntFuncType)f)(); //expected-warning {{Undefined or garbage value returned to caller}}
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}
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void rdar13665798() {
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^() {
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return foo_radar12278788(); // no-warning
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}();
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^void() {
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return foo_radar12278788(); // no-warning
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}();
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^int() {
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RetVoidFuncType f = foo_radar12278788_fp;
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return ((RetIntFuncType)f)(); //expected-warning {{Undefined or garbage value returned to caller}}
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}();
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}
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