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#include "memory.h"
#include "fiber.h"
#include "unit.h"
#include "trivia/util.h"
static struct fiber_attr default_attr;
static int
noop_f(va_list ap)
{
return 0;
}
static int
cancel_f(va_list ap)
{
fiber_set_cancellable(true);
while (true) {
fiber_sleep(0.001);
fiber_testcancel();
}
return 0;
}
static int
exception_f(va_list ap)
{
tnt_raise(OutOfMemory, 42, "allocator", "exception");
return 0;
}
static int
no_exception_f(va_list ap)
{
try {
tnt_raise(OutOfMemory, 42, "allocator", "exception");
} catch (Exception *e) {
;
}
return 0;
}
static int
cancel_dead_f(va_list ap)
{
note("cancel dead has started");
fiber_set_cancellable(true);
tnt_raise(OutOfMemory, 42, "allocator", "exception");
return 0;
}
static size_t stack_expand_limit;
static void NOINLINE
stack_expand(void *ptr)
{
char buf[2048];
memset(buf, 0x45, 2048);
ptrdiff_t stack_diff = (buf - (char *)ptr);
stack_diff = stack_diff >= 0 ? stack_diff : -stack_diff;
if (stack_diff < (ptrdiff_t)stack_expand_limit)
stack_expand(ptr);
}
static int
test_stack_f(va_list ap)
{
char s;
stack_expand(&s);
return 0;
}
static void
fiber_join_test()
{
header();
struct fiber *fiber = fiber_new_xc("join", noop_f);
fiber_set_joinable(fiber, true);
fiber_wakeup(fiber);
fiber_join(fiber);
fiber = fiber_new_xc("cancel", cancel_f);
fiber_set_joinable(fiber, true);
fiber_wakeup(fiber);
fiber_sleep(0);
fiber_cancel(fiber);
fiber_join(fiber);
fiber = fiber_new_xc("exception", exception_f);
fiber_set_joinable(fiber, true);
fiber_wakeup(fiber);
try {
if (fiber_join(fiber) != 0)
diag_raise();
fail("exception not raised", "");
} catch (Exception *e) {
note("exception propagated");
}
fputs("#gh-1238: log uncaught errors\n", stderr);
fiber = fiber_new_xc("exception", exception_f);
fiber_wakeup(fiber);
/*
* A fiber which is using exception should not
* push them up the stack.
*/
fiber = fiber_new_xc("no_exception", no_exception_f);
fiber_set_joinable(fiber, true);
fiber_wakeup(fiber);
fiber_join(fiber);
/*
* Trying to cancel a dead joinable cancellable fiber lead to
* a crash, because cancel would try to schedule it.
*/
fiber = fiber_new_xc("cancel_dead", cancel_dead_f);
fiber_set_joinable(fiber, true);
fiber_wakeup(fiber);
/** Let the fiber schedule */
fiber_wakeup(fiber());
fiber_yield();
note("by this time the fiber should be dead already");
fiber_cancel(fiber);
fiber_join(fiber);
footer();
}
void
fiber_stack_test()
{
header();
struct fiber *fiber;
struct fiber_attr *fiber_attr;
/*
* Test a fiber with the default stack size.
*/
stack_expand_limit = default_attr.stack_size * 3 / 4;
fiber = fiber_new_xc("test_stack", test_stack_f);
fiber_wakeup(fiber);
fiber_sleep(0);
note("normal-stack fiber not crashed");
/*
* Test a fiber with a custom stack size.
*/
fiber_attr = fiber_attr_new();
fiber_attr_setstacksize(fiber_attr, default_attr.stack_size * 2);
stack_expand_limit = default_attr.stack_size * 3 / 2;
fiber = fiber_new_ex("test_stack", fiber_attr, test_stack_f);
fiber_attr_delete(fiber_attr);
if (fiber == NULL)
diag_raise();
fiber_wakeup(fiber);
fiber_sleep(0);
note("big-stack fiber not crashed");
footer();
}
void
fiber_name_test()
{
header();
note("name of a new fiber: %s.\n", fiber_name(fiber()));
fiber_set_name(fiber(), "Horace");
note("set new fiber name: %s.\n", fiber_name(fiber()));
char long_name[FIBER_NAME_MAX + 30];
memset(long_name, 'a', sizeof(long_name));
long_name[sizeof(long_name) - 1] = 0;
fiber_set_name(fiber(), long_name);
note("fiber name is truncated: %s.\n", fiber_name(fiber()));
footer();
}
static int
main_f(va_list ap)
{
fiber_name_test();
fiber_join_test();
fiber_stack_test();
ev_break(loop(), EVBREAK_ALL);
return 0;
}
int main()
{
memory_init();
fiber_init(fiber_cxx_invoke);
fiber_attr_create(&default_attr);
struct fiber *main = fiber_new_xc("main", main_f);
fiber_wakeup(main);
ev_run(loop(), 0);
fiber_free();
memory_free();
return 0;
}
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