Viewing file:  builtin-snprintf-warn-4.c (1.92 KB) -rw-r--r--
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/* PR c/83448 */
/* { dg-do compile } */
/* { dg-options "-O2 -Wformat-truncation -fdiagnostics-show-caret" } */
extern int snprintf (char *, __SIZE_TYPE__, const char *, ...);
void
foo (char *a, char *b, char *c, int d, int e)
{
snprintf (a, 7, "abc\\\123 efg");
/* { dg-warning "directive output truncated writing 9 bytes into a region of size 7" "" { target *-*-* } .-1 }
{ dg-message ".snprintf. output 10 bytes into a destination of size 7" "note" { target *-*-* } .-2 }
{ dg-begin-multiline-output "" }
snprintf (a, 7, "abc\\\123 efg");
~~~~~~~~~~~^~
{ dg-end-multiline-output "" }
{ dg-begin-multiline-output "note" }
snprintf (a, 7, "abc\\\123 efg");
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
{ dg-end-multiline-output "" } */
d &= 63;
d += 10;
snprintf (b, 7, "a%dbcdefg", d);
/* { dg-warning "'bcdefg' directive output truncated writing 6 bytes into a region of size 4" "" { target *-*-* } .-1 }
{ dg-message ".snprintf. output 10 bytes into a destination of size 7" "note" { target *-*-* } .-2 }
{ dg-begin-multiline-output "" }
snprintf (b, 7, "a%dbcdefg", d);
~~~~^~
{ dg-end-multiline-output "" }
{ dg-begin-multiline-output "note" }
snprintf (b, 7, "a%dbcdefg", d);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
{ dg-end-multiline-output "" } */
e &= 127;
snprintf (c, 7, "a%dbcdefgh", e);
/* { dg-warning "'bcdefgh' directive output truncated writing 7 bytes into a region of size between 3 and 5" "" { target *-*-* } .-1 }
{ dg-message ".snprintf. output between 10 and 12 bytes into a destination of size 7" "note" { target *-*-* } .-2 }
{ dg-begin-multiline-output "" }
snprintf (c, 7, "a%dbcdefgh", e);
~~~~~^~
{ dg-end-multiline-output "" }
{ dg-begin-multiline-output "note" }
snprintf (c, 7, "a%dbcdefgh", e);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
{ dg-end-multiline-output "" } */
}
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