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/** Code generation for f8 could overwrite the lower byte of a still-needed pointer value in register x.
*/
#include <testfwk.h>
#include <string.h>
#ifdef __SDCC_pdk14
#define GUARDSIZE 4
#else
#define GUARDSIZE 16
#endif
struct a { unsigned int bitfield : 1; };
unsigned int x;
void
f (void)
{
struct a a = {0}; // Here the lower byte of a pointer to a was overwritten.
x = 0xbeef;
a.bitfield |= x; // So this 1 was stored to the wrong location.
if (a.bitfield != 1) // But this cheak read fom the wrong location, too, and thus got the correct value.
ASSERT (0);
return;
}
void h(const char *c0, const char *c1)
{
ASSERT (!memcmp (c0, c1, GUARDSIZE));
}
void
f2 (void)
{
char c0 [GUARDSIZE] = {0};
struct a a = {0};
char c1 [GUARDSIZE] = {0};
x = 0xbeef;
a.bitfield |= x;
if (a.bitfield != 1)
ASSERT (0);
h (c0, c1);
return;
}
void
f3 (void)
{
char c0 [GUARDSIZE] = {0};
char c1 [GUARDSIZE] = {0};
f ();
f2 ();
h (c0, c1);
}
void
testBug(void)
{
f ();
f2 ();
f3 ();
}
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