libakerror/tests/err_release_clears.c

#include "akerror.h"
#include "err_capture.h"
#include <string.h>

/*
 * Releasing an error context back to the pool must wipe it, so the next caller
 * that checks it out never sees stale status/message/stacktrace from a previous
 * error. Mutation testing showed the clearing memset in akerr_release_error
 * could be deleted without any test noticing.
 */

akerr_ErrorContext *boom(void)
{
    PREPARE_ERROR(e);
    FAIL_RETURN(e, AKERR_VALUE, "stale dirty message that must not survive");
}

int main(void)
{
    akerr_capture_install();
    akerr_init();

    /* Raise and fully handle an error; FINISH_NORETURN releases it to the pool. */
    PREPARE_ERROR(e);
    ATTEMPT {
        CATCH(e, boom());
    } CLEANUP {
    } PROCESS(e) {
    } HANDLE(e, AKERR_VALUE) {
	AKERR_CHECK_STATUS(e, AKERR_VALUE);
    } FINISH_NORETURN(e);

    AKERR_CHECK(e == NULL);

    /* The next context handed out is the slot we just released: it must be clean. */
    akerr_ErrorContext *slot = akerr_next_error();
    AKERR_CHECK(slot != NULL);
    AKERR_CHECK(slot->status == 0);
    AKERR_CHECK(slot->message[0] == '\0');
    AKERR_CHECK(slot->stacktracebuf[0] == '\0');
    AKERR_CHECK(strstr(slot->message, "stale dirty message") == NULL);

    fprintf(stderr, "err_release_clears ok\n");
    return 0;
}