server-skynet-source-3rd-je.../test/unit/prof_accum.c
Jason Evans ad47e8996e Break prof_accum into multiple compilation units.
Break prof_accum into multiple compilation units, in order to thwart
compiler optimizations such as inlining and tail call optimization that
would alter backtraces.
2014-02-24 22:00:10 -08:00

87 lines
1.7 KiB
C

#include "prof_accum.h"
#ifdef JEMALLOC_PROF
const char *malloc_conf =
"prof:true,prof_accum:true,prof_active:false,lg_prof_sample:0";
#endif
static int
prof_dump_open_intercept(bool propagate_err, const char *filename)
{
int fd;
fd = open("/dev/null", O_WRONLY);
assert_d_ne(fd, -1, "Unexpected open() failure");
return (fd);
}
static void *
alloc_from_permuted_backtrace(unsigned thd_ind, unsigned iteration)
{
return (alloc_0(thd_ind*NALLOCS_PER_THREAD + iteration));
}
static void *
thd_start(void *varg)
{
unsigned thd_ind = *(unsigned *)varg;
size_t bt_count_prev, bt_count;
unsigned i_prev, i;
i_prev = 0;
bt_count_prev = 0;
for (i = 0; i < NALLOCS_PER_THREAD; i++) {
void *p = alloc_from_permuted_backtrace(thd_ind, i);
dallocx(p, 0);
if (i % DUMP_INTERVAL == 0) {
assert_d_eq(mallctl("prof.dump", NULL, NULL, NULL, 0),
0, "Unexpected error while dumping heap profile");
}
if (i % BT_COUNT_CHECK_INTERVAL == 0 ||
i+1 == NALLOCS_PER_THREAD) {
bt_count = prof_bt_count();
assert_zu_le(bt_count_prev+(i-i_prev), bt_count,
"Expected larger backtrace count increase");
i_prev = i;
bt_count_prev = bt_count;
}
}
return (NULL);
}
TEST_BEGIN(test_idump)
{
bool active;
thd_t thds[NTHREADS];
unsigned thd_args[NTHREADS];
unsigned i;
test_skip_if(!config_prof);
active = true;
assert_d_eq(mallctl("prof.active", NULL, NULL, &active, sizeof(active)),
0, "Unexpected mallctl failure while activating profiling");
prof_dump_open = prof_dump_open_intercept;
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
int
main(void)
{
return (test(
test_idump));
}