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tests/mpu_stack_guard: Fix compilation on modern GCC (>= 12.x)

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The `mpu_stack_guard` test intentionally overflows the stack with a
stupid infinite recursion. Newer versions of GCC started to dislike
this, so this disables the corresponding diagnostics to get the
intentional stack overflow still compiled.
This commit is contained in:
Marian Buschsieweke 2022-11-10 12:49:18 +01:00
parent 24262f1279
commit fdc3f6a56b
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1 changed files with 11 additions and 0 deletions
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11
tests/mpu_stack_guard/main.c
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@ -38,6 +38,16 @@ static struct {
char stack[THREAD_STACKSIZE_MAIN];
} buf;
/* Tell modern GCC (12.x) to not complain that this infinite recursion is
* bound to overflow the stack - this is exactly what this test wants to do :)
*
* Also, tell older versions of GCC that do not know about -Winfinit-recursion
* that it is safe to ignore `GCC diagnostics ignored "-Winfinit-recursion"`.
* They behave as intended in this case :)
*/
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wpragmas"
#pragma GCC diagnostic ignored "-Winfinite-recursion"
static int recurse(int counter)
{
printf("counter =%4d, SP = 0x%08x, canary = 0x%08x\n", counter, (unsigned int)__get_PSP(), buf.canary);
@ -55,6 +65,7 @@ static int recurse(int counter)
/* Recursing twice here prevents the compiler from optimizing-out the recursion. */
return recurse(counter) + recurse(counter);
}
#pragma GCC diagnostic pop
static void *thread(void *arg)
{