Viewing file:  pr96651-2.c (2.76 KB) -rw-r--r--
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#include "analyzer-decls.h"
extern void unknown_fn (void *, void *);
static int a;
static int b = 42;
int c;
int d = 17;
struct { int x; int y; char rgb[3]; } s = {5, 10, {0x80, 0x40, 0x20}};
void *e = &d;
extern struct _IO_FILE *stderr;
/* If we're not on a direct path from "main", we know nothing about
the values of globals. */
void test (void)
{
__analyzer_eval (a == 0); /* { dg-warning "UNKNOWN" } */
__analyzer_eval (b == 42); /* { dg-warning "UNKNOWN" } */
__analyzer_eval (c == 0); /* { dg-warning "UNKNOWN" } */
__analyzer_eval (d == 17); /* { dg-warning "UNKNOWN" } */
__analyzer_eval (s.rgb[2] == 0x20); /* { dg-warning "UNKNOWN" } */
__analyzer_eval (e == &d); /* { dg-warning "UNKNOWN" } */
__analyzer_eval (stderr == 0); /* { dg-warning "UNKNOWN" } */
}
static void __attribute__((noinline))
__analyzer_called_from_main (void)
{
/* When accessed from main, the vars still have their initializer values. */
__analyzer_eval (a == 0); /* { dg-warning "TRUE" } */
__analyzer_eval (b == 42); /* { dg-warning "TRUE" } */
__analyzer_eval (c == 0); /* { dg-warning "TRUE" } */
__analyzer_eval (d == 17); /* { dg-warning "TRUE" } */
__analyzer_eval (s.rgb[2] == 0x20); /* { dg-warning "TRUE" } */
__analyzer_eval (e == &d); /* { dg-warning "TRUE" } */
/* ...apart from those defined in a different TU (or that were inited
before "main"). */
__analyzer_eval (stderr == 0); /* { dg-warning "UNKNOWN" } */
}
int main (void)
{
/* When accessed from main, the vars still have their initializer values. */
__analyzer_eval (a == 0); /* { dg-warning "TRUE" } */
__analyzer_eval (b == 42); /* { dg-warning "TRUE" } */
__analyzer_eval (c == 0); /* { dg-warning "TRUE" } */
__analyzer_eval (d == 17); /* { dg-warning "TRUE" } */
__analyzer_eval (s.rgb[2] == 0x20); /* { dg-warning "TRUE" } */
__analyzer_eval (e == &d); /* { dg-warning "TRUE" } */
/* ...apart from those defined in a different TU (or that were inited
before "main"). */
__analyzer_eval (stderr == 0); /* { dg-warning "UNKNOWN" } */
__analyzer_called_from_main ();
unknown_fn (&a, &c);
/* "a" escaped above and so could have been written to. */
__analyzer_eval (a == 0); /* { dg-warning "UNKNOWN" } */
/* "b" doesn't escape and is static, and so must still have its
initial value. */
__analyzer_eval (b == 42); /* { dg-warning "TRUE" } */
/* The other globals are non-static and so have implicitly escaped,
and so could have been written to. */
__analyzer_eval (c == 0); /* { dg-warning "UNKNOWN" } */
__analyzer_eval (d == 17); /* { dg-warning "UNKNOWN" } */
__analyzer_eval (s.rgb[2] == 0x20); /* { dg-warning "UNKNOWN" } */
__analyzer_eval (e == &d); /* { dg-warning "UNKNOWN" } */
__analyzer_eval (stderr == 0); /* { dg-warning "UNKNOWN" } */
}
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