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test_suite_debug: test the printf used by debug.c

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In `test_suite_debug`, test `mbedtls_debug_snprintf()`, which uses
`mbedtls_vsnprintf()` like `mbedtls_debug_print_msg()`. Do this instead of
testing `mbedtls_snprintf()`, which might be subtly different (older
Windows runtimes had slightly different behavior for vsnprintf() vs
snprintf(); TF-PSA-Crypto might pick up a different function if the
platform configuration is different in TF-PSA-Crypto and Mbed TLS).

Signed-off-by: Gilles Peskine <[email protected]>
This commit is contained in:
Gilles Peskine
2026-02-26 20:56:03 +01:00
parent 7af09b4f21
commit 3c67824964
3 changed files with 26 additions and 3 deletions
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tests/suites/test_suite_debug.function
+3 -3
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@@ -116,11 +116,11 @@ void printf_int_expr(int format_indicator, intmax_t sizeof_x, intmax_t x, char *
/* Nominal case: buffer just large enough */
TEST_CALLOC(output, n + 1);
if ((size_t) sizeof_x <= sizeof(int)) { // Any smaller integers would be promoted to an int due to calling a vararg function
TEST_EQUAL(n, mbedtls_snprintf(output, n + 1, format, (int) x));
TEST_EQUAL(n, mbedtls_debug_snprintf(output, n + 1, format, (int) x));
} else if (sizeof_x == sizeof(long)) {
TEST_EQUAL(n, mbedtls_snprintf(output, n + 1, format, (long) x));
TEST_EQUAL(n, mbedtls_debug_snprintf(output, n + 1, format, (long) x));
} else if (sizeof_x == sizeof(long long)) {
TEST_EQUAL(n, mbedtls_snprintf(output, n + 1, format, (long long) x));
TEST_EQUAL(n, mbedtls_debug_snprintf(output, n + 1, format, (long long) x));
} else {
TEST_FAIL(
"sizeof_x <= sizeof(int) || sizeof_x == sizeof(long) || sizeof_x == sizeof(long long)");