59 lines
2.0 KiB
C
59 lines
2.0 KiB
C
// RUN: %clang_cc1 -analyze -analyzer-checker=core -verify -std=c99 -Dbool=_Bool %s
|
|
// RUN: %clang_cc1 -analyze -analyzer-checker=core -verify -x c++ %s
|
|
|
|
typedef __INTPTR_TYPE__ intptr_t;
|
|
char const *p;
|
|
|
|
void f0() {
|
|
char const str[] = "This will change";
|
|
p = str;
|
|
} // expected-warning{{Address of stack memory associated with local variable 'str' is still referred to by the global variable 'p' upon returning to the caller. This will be a dangling reference}}
|
|
|
|
void f1() {
|
|
char const str[] = "This will change";
|
|
p = str;
|
|
p = 0; // no-warning
|
|
}
|
|
|
|
void f2() {
|
|
p = (const char *) __builtin_alloca(12);
|
|
} // expected-warning{{Address of stack memory allocated by call to alloca() on line 19 is still referred to by the global variable 'p' upon returning to the caller. This will be a dangling reference}}
|
|
|
|
// PR 7383 - previosly the stack address checker would crash on this example
|
|
// because it would attempt to do a direct load from 'pr7383_list'.
|
|
static int pr7383(__const char *__)
|
|
{
|
|
return 0;
|
|
}
|
|
extern __const char *__const pr7383_list[];
|
|
|
|
// Test that we catch multiple returns via globals when analyzing a function.
|
|
void test_multi_return() {
|
|
static int *a, *b;
|
|
int x;
|
|
a = &x;
|
|
b = &x;
|
|
} // expected-warning{{Address of stack memory associated with local variable 'x' is still referred to by the global variable 'a' upon returning}} expected-warning{{Address of stack memory associated with local variable 'x' is still referred to by the global variable 'b' upon returning}}
|
|
|
|
intptr_t returnAsNonLoc() {
|
|
int x;
|
|
return (intptr_t)&x; // expected-warning{{Address of stack memory associated with local variable 'x' returned to caller}}
|
|
}
|
|
|
|
bool returnAsBool() {
|
|
int x;
|
|
return &x; // no-warning
|
|
}
|
|
|
|
void assignAsNonLoc() {
|
|
extern intptr_t ip;
|
|
int x;
|
|
ip = (intptr_t)&x;
|
|
} // expected-warning{{Address of stack memory associated with local variable 'x' is still referred to by the global variable 'ip' upon returning}}
|
|
|
|
void assignAsBool() {
|
|
extern bool b;
|
|
int x;
|
|
b = &x;
|
|
} // no-warning
|