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// RUN: %clang_analyze_cc1 -analyzer-checker=core -verify -std=c99 -Dbool=_Bool -Wno-bool-conversion %s
// RUN: %clang_analyze_cc1 -analyzer-checker=core -verify -x c++ -Wno-bool-conversion %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 - previously 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 static variable 'a' upon returning}} expected-warning{{Address of stack memory associated with local variable 'x' is still referred to by the static 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
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