Viewing file:  warn-sprintf-no-nul-2.c (2.35 KB) -rw-r--r--
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/* PR tree-optimization/87756 - missing unterminated argument warning
using address of a constant character
{ dg-do compile }
{ dg-options "-O2 -Wall -ftrack-macro-expansion=0" } */
int sprintf (char*, const char*, ...);
extern char* dest (void);
extern void sink (int, ...);
#define D dest ()
#define T(expr) sink (0, (expr))
const char cnul = '\0';
const char cnonul = 'a';
const char str3[] = "123";
const struct
{
char a, b, s[3];
} s1 = { '\0', 'b', "123" },
s2[2] = {
{ '\0', 'c', "12" },
{ 'd', '\0', "123" }
};
void test_sprintf_s (void)
{
T (sprintf (D, "%s", &cnul));
T (sprintf (D, "%s", &cnonul)); /* { dg-warning "nul-terminated" } */
T (sprintf (D, "%.1s", &cnonul));
T (sprintf (D, "%.2s", &cnonul)); /* { dg-warning "nul-terminated" } */
T (sprintf (D, "%s", &s1.a));
T (sprintf (D, "%s", &s1.b)); /* { dg-warning "nul-terminated" } */
T (sprintf (D, "%.1s", &s1.b));
T (sprintf (D, "%.2s", &s1.b)); /* { dg-warning "nul-terminated" } */
T (sprintf (D, "%s", s1.s)); /* { dg-warning "nul-terminated" } */
T (sprintf (D, "%.3s", s1.s));
T (sprintf (D, "%.4s", s1.s)); /* { dg-warning "nul-terminated" } */
T (sprintf (D, "%.2s", s1.s + 1));
T (sprintf (D, "%.3s", s1.s + 1)); /* { dg-warning "nul-terminated" } */
T (sprintf (D, "%s", &s2[0].a));
T (sprintf (D, "%s", &s2[0].b)); /* { dg-warning "nul-terminated" } */
T (sprintf (D, "%.1s", &s2[0].b));
T (sprintf (D, "%.2s", &s2[0].b)); /* { dg-warning "nul-terminated" } */
T (sprintf (D, "%s", s2[0].s));
T (sprintf (D, "%.3s", s2[0].s));
T (sprintf (D, "%.4s", s2[0].s));
T (sprintf (D, "%.2s", s2[0].s + 1));
T (sprintf (D, "%.3s", s2[0].s + 1));
T (sprintf (D, "%s", &s2[1].a)); /* { dg-warning "nul-terminated" } */
T (sprintf (D, "%.1s", &s2[1].a));
T (sprintf (D, "%.2s", &s2[1].a)); /* { dg-warning "nul-terminated" } */
T (sprintf (D, "%s", &s2[1].b));
T (sprintf (D, "%s", s2[1].s)); /* { dg-warning "nul-terminated" } */
T (sprintf (D, "%.3s", s2[1].s));
T (sprintf (D, "%.4s", s2[1].s)); /* { dg-warning "nul-terminated" } */
T (sprintf (D, "%.2s", s2[1].s + 1));
T (sprintf (D, "%.3s", s2[1].s + 1)); /* { dg-warning "nul-terminated" } */
T (sprintf (D, "%s", &str3[3]));
T (sprintf (D, "%s", &str3[4])); /* { dg-warning "\\\[-Warray-bounds" } */
}
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