server-skynet-source-3rd-je.../test/unit/prof_thread_name.c
Jason Evans 57efa7bb0e Avoid atexit(3) when possible, disable prof_final by default.
atexit(3) can deadlock internally during its own initialization if
jemalloc calls atexit() during jemalloc initialization.  Mitigate the
impact by restructuring prof initialization to avoid calling atexit()
unless the registered function will actually dump a final heap profile.

Additionally, disable prof_final by default so that this land mine is
opt-in rather than opt-out.

This resolves #144.
2014-10-08 18:08:00 -07:00

130 lines
3.2 KiB
C

#include "test/jemalloc_test.h"
#ifdef JEMALLOC_PROF
const char *malloc_conf = "prof:true,prof_active:false";
#endif
static void
mallctl_thread_name_get_impl(const char *thread_name_expected, const char *func,
int line)
{
const char *thread_name_old;
size_t sz;
sz = sizeof(thread_name_old);
assert_d_eq(mallctl("thread.prof.name", &thread_name_old, &sz, NULL, 0),
0, "%s():%d: Unexpected mallctl failure reading thread.prof.name",
func, line);
assert_str_eq(thread_name_old, thread_name_expected,
"%s():%d: Unexpected thread.prof.name value", func, line);
}
#define mallctl_thread_name_get(a) \
mallctl_thread_name_get_impl(a, __func__, __LINE__)
static void
mallctl_thread_name_set_impl(const char *thread_name, const char *func,
int line)
{
assert_d_eq(mallctl("thread.prof.name", NULL, NULL, &thread_name,
sizeof(thread_name)), 0,
"%s():%d: Unexpected mallctl failure reading thread.prof.name",
func, line);
mallctl_thread_name_get_impl(thread_name, func, line);
}
#define mallctl_thread_name_set(a) \
mallctl_thread_name_set_impl(a, __func__, __LINE__)
TEST_BEGIN(test_prof_thread_name_validation)
{
const char *thread_name;
test_skip_if(!config_prof);
mallctl_thread_name_get("");
mallctl_thread_name_set("hi there");
/* NULL input shouldn't be allowed. */
thread_name = NULL;
assert_d_eq(mallctl("thread.prof.name", NULL, NULL, &thread_name,
sizeof(thread_name)), EFAULT,
"Unexpected mallctl result writing \"%s\" to thread.prof.name",
thread_name);
/* '\n' shouldn't be allowed. */
thread_name = "hi\nthere";
assert_d_eq(mallctl("thread.prof.name", NULL, NULL, &thread_name,
sizeof(thread_name)), EFAULT,
"Unexpected mallctl result writing \"%s\" to thread.prof.name",
thread_name);
/* Simultaneous read/write shouldn't be allowed. */
{
const char *thread_name_old;
size_t sz;
sz = sizeof(thread_name_old);
assert_d_eq(mallctl("thread.prof.name", &thread_name_old, &sz,
&thread_name, sizeof(thread_name)), EPERM,
"Unexpected mallctl result writing \"%s\" to "
"thread.prof.name", thread_name);
}
mallctl_thread_name_set("");
}
TEST_END
#define NTHREADS 4
#define NRESET 25
static void *
thd_start(void *varg)
{
unsigned thd_ind = *(unsigned *)varg;
char thread_name[16] = "";
unsigned i;
malloc_snprintf(thread_name, sizeof(thread_name), "thread %u", thd_ind);
mallctl_thread_name_get("");
mallctl_thread_name_set(thread_name);
for (i = 0; i < NRESET; i++) {
assert_d_eq(mallctl("prof.reset", NULL, NULL, NULL, 0), 0,
"Unexpected error while resetting heap profile data");
mallctl_thread_name_get(thread_name);
}
mallctl_thread_name_set(thread_name);
mallctl_thread_name_set("");
return (NULL);
}
TEST_BEGIN(test_prof_thread_name_threaded)
{
thd_t thds[NTHREADS];
unsigned thd_args[NTHREADS];
unsigned i;
test_skip_if(!config_prof);
for (i = 0; i < NTHREADS; i++) {
thd_args[i] = i;
thd_create(&thds[i], thd_start, (void *)&thd_args[i]);
}
for (i = 0; i < NTHREADS; i++)
thd_join(thds[i], NULL);
}
TEST_END
#undef NTHREADS
#undef NRESET
int
main(void)
{
return (test(
test_prof_thread_name_validation,
test_prof_thread_name_threaded));
}