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Test prof.reset mallctl and fix numerous discovered bugs.

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This commit is contained in:
Jason Evans 2014-10-02 23:01:10 -07:00
parent cc9e626ea9
commit 20c31deaae
5 changed files with 404 additions and 75 deletions
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5
doc/jemalloc.xml.in
View File

@ -1547,7 +1547,8 @@ malloc_conf = "xmalloc:true";]]></programlisting>
</term>
<listitem><para>Reset all memory profile statistics, and optionally
update the sample rate (see <link
linkend="opt.lg_prof_sample"><mallctl>opt.lg_prof_sample</mallctl></link>).
linkend="opt.lg_prof_sample"><mallctl>opt.lg_prof_sample</mallctl></link>
and <link linkend="prof.lg_sample"><mallctl>prof.lg_sample</mallctl>).
</para></listitem>
</varlistentry>
@ -1558,7 +1559,7 @@ malloc_conf = "xmalloc:true";]]></programlisting>
<literal>r-</literal>
[<option>--enable-prof</option>]
</term>
<listitem><para>Get the sample rate (see <link
<listitem><para>Get the current sample rate (see <link
linkend="opt.lg_prof_sample"><mallctl>opt.lg_prof_sample</mallctl></link>).
</para></listitem>
</varlistentry>

1
include/jemalloc/internal/private_symbols.txt
View File

@ -292,6 +292,7 @@ prof_boot0
prof_boot1
prof_boot2
prof_bt_count
prof_dump_header
prof_dump_open
prof_free
prof_free_sampled_object

24
include/jemalloc/internal/prof.h
View File

@ -151,22 +151,23 @@ struct prof_gctx_s {
};
typedef rb_tree(prof_gctx_t) prof_gctx_tree_t;
typedef enum {
prof_tdata_state_attached, /* Active thread attached, data valid. */
prof_tdata_state_detached, /* Defunct thread, data remain valid. */
prof_tdata_state_expired /* Predates reset, omit data from dump. */
} prof_tdata_state_t;
struct prof_tdata_s {
malloc_mutex_t *lock;
/* Monotonically increasing unique thread identifier. */
uint64_t thr_uid;
/*
* Monotonically increasing discriminator among tdata structures
* associated with the same thr_uid.
*/
uint64_t thr_discrim;
/* Included in heap profile dumps if non-NULL. */
char *thread_name;
prof_tdata_state_t state;
bool attached;
bool expired;
rb_node(prof_tdata_t) tdata_link;
@ -257,9 +258,13 @@ void bt_init(prof_bt_t *bt, void **vec);
void prof_backtrace(prof_bt_t *bt);
prof_tctx_t *prof_lookup(tsd_t *tsd, prof_bt_t *bt);
#ifdef JEMALLOC_JET
size_t prof_tdata_count(void);
size_t prof_bt_count(void);
const prof_cnt_t *prof_cnt_all(void);
typedef int (prof_dump_open_t)(bool, const char *);
extern prof_dump_open_t *prof_dump_open;
typedef bool (prof_dump_header_t)(bool, const prof_cnt_t *);
extern prof_dump_header_t *prof_dump_header;
#endif
void prof_idump(void);
bool prof_mdump(const char *filename);
@ -312,12 +317,11 @@ prof_tdata_get(tsd_t *tsd, bool create)
if (unlikely(tdata == NULL)) {
tdata = prof_tdata_init(tsd);
tsd_prof_tdata_set(tsd, tdata);
} else if (unlikely(tdata->state == prof_tdata_state_expired)) {
} else if (unlikely(tdata->expired)) {
tdata = prof_tdata_reinit(tsd, tdata);
tsd_prof_tdata_set(tsd, tdata);
}
assert(tdata == NULL ||
tdata->state == prof_tdata_state_attached);
assert(tdata == NULL || tdata->attached);
}
return (tdata);

201
src/prof.c
View File

@ -137,10 +137,18 @@ rb_gen(static UNUSED, gctx_tree_, prof_gctx_tree_t, prof_gctx_t, dump_link,
JEMALLOC_INLINE_C int
prof_tdata_comp(const prof_tdata_t *a, const prof_tdata_t *b)
{
int ret;
uint64_t a_uid = a->thr_uid;
uint64_t b_uid = b->thr_uid;
return ((a_uid > b_uid) - (a_uid < b_uid));
ret = ((a_uid > b_uid) - (a_uid < b_uid));
if (ret == 0) {
uint64_t a_discrim = a->thr_discrim;
uint64_t b_discrim = b->thr_discrim;
ret = ((a_discrim > b_discrim) - (a_discrim < b_discrim));
}
return (ret);
}
rb_gen(static UNUSED, tdata_tree_, prof_tdata_tree_t, prof_tdata_t, tdata_link,
@ -504,7 +512,7 @@ prof_gctx_create(tsd_t *tsd, prof_bt_t *bt)
gctx->lock = prof_gctx_mutex_choose();
/*
* Set nlimbo to 1, in order to avoid a race condition with
* prof_tctx_destroy()/prof_gctx_maybe_destroy().
* prof_tctx_destroy()/prof_gctx_try_destroy().
*/
gctx->nlimbo = 1;
tctx_tree_new(&gctx->tctxs);
@ -516,7 +524,7 @@ prof_gctx_create(tsd_t *tsd, prof_bt_t *bt)
}
static void
prof_gctx_maybe_destroy(tsd_t *tsd, prof_gctx_t *gctx, prof_tdata_t *tdata)
prof_gctx_try_destroy(tsd_t *tsd, prof_gctx_t *gctx, prof_tdata_t *tdata)
{
cassert(config_prof);
@ -530,6 +538,7 @@ prof_gctx_maybe_destroy(tsd_t *tsd, prof_gctx_t *gctx, prof_tdata_t *tdata)
*/
prof_enter(tdata);
malloc_mutex_lock(gctx->lock);
assert(gctx->nlimbo != 0);
if (tctx_tree_empty(&gctx->tctxs) && gctx->nlimbo == 1) {
/* Remove gctx from bt2gctx. */
if (ckh_remove(tsd, &bt2gctx, &gctx->bt, NULL, NULL))
@ -605,10 +614,10 @@ prof_tctx_destroy(tsd_t *tsd, prof_tctx_t *tctx)
*
* 1) Sample an allocation associated with gctx.
* 2) Deallocate the sampled object.
* 3) Successfully prof_gctx_maybe_destroy(gctx).
* 3) Successfully prof_gctx_try_destroy(gctx).
*
* The result would be that gctx no longer exists by the time
* this thread accesses it in prof_gctx_maybe_destroy().
* this thread accesses it in prof_gctx_try_destroy().
*/
gctx->nlimbo++;
destroy_gctx = true;
@ -616,7 +625,7 @@ prof_tctx_destroy(tsd_t *tsd, prof_tctx_t *tctx)
destroy_gctx = false;
malloc_mutex_unlock(gctx->lock);
if (destroy_gctx)
prof_gctx_maybe_destroy(tsd, gctx, tdata);
prof_gctx_try_destroy(tsd, gctx, tdata);
if (destroy_tdata)
prof_tdata_destroy(tsd, tdata);
@ -657,7 +666,7 @@ prof_lookup_global(tsd_t *tsd, prof_bt_t *bt, prof_tdata_t *tdata,
} else {
/*
* Increment nlimbo, in order to avoid a race condition with
* prof_tctx_destroy()/prof_gctx_maybe_destroy().
* prof_tctx_destroy()/prof_gctx_try_destroy().
*/
malloc_mutex_lock(gctx.p->lock);
gctx.p->nlimbo++;
@ -710,7 +719,7 @@ prof_lookup(tsd_t *tsd, prof_bt_t *bt)
ret.v = imalloc(tsd, sizeof(prof_tctx_t));
if (ret.p == NULL) {
if (new_gctx)
prof_gctx_maybe_destroy(tsd, gctx, tdata);
prof_gctx_try_destroy(tsd, gctx, tdata);
return (NULL);
}
ret.p->tdata = tdata;
@ -723,7 +732,7 @@ prof_lookup(tsd_t *tsd, prof_bt_t *bt)
malloc_mutex_unlock(tdata->lock);
if (error) {
if (new_gctx)
prof_gctx_maybe_destroy(tsd, gctx, tdata);
prof_gctx_try_destroy(tsd, gctx, tdata);
idalloc(tsd, ret.v);
return (NULL);
}
@ -792,6 +801,31 @@ prof_sample_threshold_update(prof_tdata_t *tdata)
#endif
}
#ifdef JEMALLOC_JET
static prof_tdata_t *
prof_tdata_count_iter(prof_tdata_tree_t *tdatas, prof_tdata_t *tdata, void *arg)
{
size_t *tdata_count = (size_t *)arg;
(*tdata_count)++;
return (NULL);
}
size_t
prof_tdata_count(void)
{
size_t tdata_count = 0;
malloc_mutex_lock(&tdatas_mtx);
tdata_tree_iter(&tdatas, NULL, prof_tdata_count_iter,
(void *)&tdata_count);
malloc_mutex_unlock(&tdatas_mtx);
return (tdata_count);
}
#endif
#ifdef JEMALLOC_JET
size_t
prof_bt_count(void)
@ -998,7 +1032,6 @@ static prof_tctx_t *
prof_tctx_finish_iter(prof_tctx_tree_t *tctxs, prof_tctx_t *tctx, void *arg)
{
prof_tctx_t *ret;
tsd_t *tsd = (tsd_t *)arg;
switch (tctx->state) {
case prof_tctx_state_nominal:
@ -1008,9 +1041,7 @@ prof_tctx_finish_iter(prof_tctx_tree_t *tctxs, prof_tctx_t *tctx, void *arg)
tctx->state = prof_tctx_state_nominal;
break;
case prof_tctx_state_purgatory:
ret = tctx_tree_next(tctxs, tctx);
tctx_tree_remove(tctxs, tctx);
idalloc(tsd, tctx);
ret = tctx;
goto label_return;
default:
not_reached();
@ -1056,27 +1087,47 @@ prof_gctx_merge_iter(prof_gctx_tree_t *gctxs, prof_gctx_t *gctx, void *arg)
return (NULL);
}
static prof_gctx_t *
prof_gctx_finish_iter(prof_gctx_tree_t *gctxs, prof_gctx_t *gctx, void *arg)
static void
prof_gctx_finish(tsd_t *tsd, prof_gctx_tree_t *gctxs)
{
tsd_t *tsd = (tsd_t *)arg;
prof_tdata_t *tdata = prof_tdata_get(tsd, false);
prof_tctx_t *next;
bool destroy_gctx;
prof_gctx_t *gctx;
/*
* Standard tree iteration won't work here, because as soon as we
* decrement gctx->nlimbo and unlock gctx, another thread can
* concurrently destroy it, which will corrupt the tree. Therefore,
* tear down the tree one node at a time during iteration.
*/
while ((gctx = gctx_tree_first(gctxs)) != NULL) {
gctx_tree_remove(gctxs, gctx);
malloc_mutex_lock(gctx->lock);
{
prof_tctx_t *next;
next = NULL;
do {
next = tctx_tree_iter(&gctx->tctxs, next, prof_tctx_finish_iter,
tsd);
prof_tctx_t *to_destroy =
tctx_tree_iter(&gctx->tctxs, next,
prof_tctx_finish_iter, NULL);
if (to_destroy != NULL) {
next = tctx_tree_next(&gctx->tctxs,
to_destroy);
tctx_tree_remove(&gctx->tctxs,
to_destroy);
idalloc(tsd, to_destroy);
} else
next = NULL;
} while (next != NULL);
}
gctx->nlimbo--;
destroy_gctx = prof_gctx_should_destroy(gctx);
if (prof_gctx_should_destroy(gctx)) {
gctx->nlimbo++;
malloc_mutex_unlock(gctx->lock);
if (destroy_gctx)
prof_gctx_maybe_destroy(tsd, gctx, tdata);
return (NULL);
prof_gctx_try_destroy(tsd, gctx, tdata);
} else
malloc_mutex_unlock(gctx->lock);
}
}
static prof_tdata_t *
@ -1085,7 +1136,7 @@ prof_tdata_merge_iter(prof_tdata_tree_t *tdatas, prof_tdata_t *tdata, void *arg)
prof_cnt_t *cnt_all = (prof_cnt_t *)arg;
malloc_mutex_lock(tdata->lock);
if (tdata->state != prof_tdata_state_expired) {
if (!tdata->expired) {
size_t tabind;
union {
prof_tctx_t *p;
@ -1130,6 +1181,10 @@ prof_tdata_dump_iter(prof_tdata_tree_t *tdatas, prof_tdata_t *tdata, void *arg)
return (NULL);
}
#ifdef JEMALLOC_JET
#undef prof_dump_header
#define prof_dump_header JEMALLOC_N(prof_dump_header_impl)
#endif
static bool
prof_dump_header(bool propagate_err, const prof_cnt_t *cnt_all)
{
@ -1148,6 +1203,11 @@ prof_dump_header(bool propagate_err, const prof_cnt_t *cnt_all)
malloc_mutex_unlock(&tdatas_mtx);
return (ret);
}
#ifdef JEMALLOC_JET
#undef prof_dump_header
#define prof_dump_header JEMALLOC_N(prof_dump_header)
prof_dump_header_t *prof_dump_header = JEMALLOC_N(prof_dump_header_impl);
#endif
/* gctx->lock is held. */
static bool
@ -1277,7 +1337,7 @@ prof_gctx_dump_iter(prof_gctx_tree_t *gctxs, prof_gctx_t *gctx, void *arg)
malloc_mutex_lock(gctx->lock);
if (prof_dump_gctx(propagate_err, gctx, &gctx->bt, gctxs)) {
ret = gctx_tree_next(gctxs, gctx);
ret = gctx;
goto label_return;
}
@ -1302,7 +1362,7 @@ prof_dump(tsd_t *tsd, bool propagate_err, const char *filename, bool leakcheck)
cassert(config_prof);
tdata = prof_tdata_get(tsd, false);
tdata = prof_tdata_get(tsd, true);
if (tdata == NULL)
return (true);
@ -1352,7 +1412,7 @@ prof_dump(tsd_t *tsd, bool propagate_err, const char *filename, bool leakcheck)
if (prof_dump_close(propagate_err))
goto label_open_close_error;
gctx_tree_iter(&gctxs, NULL, prof_gctx_finish_iter, tsd);
prof_gctx_finish(tsd, &gctxs);
malloc_mutex_unlock(&prof_dump_mtx);
if (leakcheck)
@ -1362,7 +1422,7 @@ prof_dump(tsd_t *tsd, bool propagate_err, const char *filename, bool leakcheck)
label_write_error:
prof_dump_close(propagate_err);
label_open_close_error:
gctx_tree_iter(&gctxs, NULL, prof_gctx_finish_iter, tsd);
prof_gctx_finish(tsd, &gctxs);
malloc_mutex_unlock(&prof_dump_mtx);
return (true);
}
@ -1533,7 +1593,7 @@ prof_thr_uid_alloc(void)
}
static prof_tdata_t *
prof_tdata_init_impl(tsd_t *tsd, uint64_t thr_uid)
prof_tdata_init_impl(tsd_t *tsd, uint64_t thr_uid, uint64_t thr_discrim)
{
prof_tdata_t *tdata;
@ -1546,8 +1606,10 @@ prof_tdata_init_impl(tsd_t *tsd, uint64_t thr_uid)
tdata->lock = prof_tdata_mutex_choose(thr_uid);
tdata->thr_uid = thr_uid;
tdata->thr_discrim = thr_discrim;
tdata->thread_name = NULL;
tdata->state = prof_tdata_state_attached;
tdata->attached = true;
tdata->expired = false;
if (ckh_new(tsd, &tdata->bt2tctx, PROF_CKH_MINITEMS,
prof_bt_hash, prof_bt_keycomp)) {
@ -1576,14 +1638,7 @@ prof_tdata_t *
prof_tdata_init(tsd_t *tsd)
{
return (prof_tdata_init_impl(tsd, prof_thr_uid_alloc()));
}
prof_tdata_t *
prof_tdata_reinit(tsd_t *tsd, prof_tdata_t *tdata)
{
return (prof_tdata_init_impl(tsd, tdata->thr_uid));
return (prof_tdata_init_impl(tsd, prof_thr_uid_alloc(), 0));
}
/* tdata->lock must be held. */
@ -1591,22 +1646,21 @@ static bool
prof_tdata_should_destroy(prof_tdata_t *tdata)
{
if (tdata->state == prof_tdata_state_attached)
if (tdata->attached)
return (false);
if (ckh_count(&tdata->bt2tctx) != 0)
return (false);
return (true);
}
/* tdatas_mtx must be held. */
static void
prof_tdata_destroy(tsd_t *tsd, prof_tdata_t *tdata)
prof_tdata_destroy_locked(tsd_t *tsd, prof_tdata_t *tdata)
{
assert(prof_tdata_should_destroy(tdata));
malloc_mutex_lock(&tdatas_mtx);
tdata_tree_remove(&tdatas, tdata);
malloc_mutex_unlock(&tdatas_mtx);
if (tdata->thread_name != NULL)
idalloc(tsd, tdata->thread_name);
@ -1615,14 +1669,22 @@ prof_tdata_destroy(tsd_t *tsd, prof_tdata_t *tdata)
}
static void
prof_tdata_state_transition(tsd_t *tsd, prof_tdata_t *tdata,
prof_tdata_state_t state)
prof_tdata_destroy(tsd_t *tsd, prof_tdata_t *tdata)
{
malloc_mutex_lock(&tdatas_mtx);
prof_tdata_destroy_locked(tsd, tdata);
malloc_mutex_unlock(&tdatas_mtx);
}
static void
prof_tdata_detach(tsd_t *tsd, prof_tdata_t *tdata)
{
bool destroy_tdata;
malloc_mutex_lock(tdata->lock);
if (tdata->state != state) {
tdata->state = state;
if (tdata->attached) {
tdata->attached = false;
destroy_tdata = prof_tdata_should_destroy(tdata);
} else
destroy_tdata = false;
@ -1631,32 +1693,44 @@ prof_tdata_state_transition(tsd_t *tsd, prof_tdata_t *tdata,
prof_tdata_destroy(tsd, tdata);
}
static void
prof_tdata_detach(tsd_t *tsd, prof_tdata_t *tdata)
prof_tdata_t *
prof_tdata_reinit(tsd_t *tsd, prof_tdata_t *tdata)
{
uint64_t thr_uid = tdata->thr_uid;
uint64_t thr_discrim = tdata->thr_discrim + 1;
prof_tdata_state_transition(tsd, tdata, prof_tdata_state_detached);
prof_tdata_detach(tsd, tdata);
return (prof_tdata_init_impl(tsd, thr_uid, thr_discrim));
}
static void
prof_tdata_expire(tsd_t *tsd, prof_tdata_t *tdata)
static bool
prof_tdata_expire(prof_tdata_t *tdata)
{
bool destroy_tdata;
prof_tdata_state_transition(tsd, tdata, prof_tdata_state_expired);
malloc_mutex_lock(tdata->lock);
if (!tdata->expired) {
tdata->expired = true;
destroy_tdata = tdata->attached ? false :
prof_tdata_should_destroy(tdata);
} else
destroy_tdata = false;
malloc_mutex_unlock(tdata->lock);
return (destroy_tdata);
}
static prof_tdata_t *
prof_tdata_reset_iter(prof_tdata_tree_t *tdatas, prof_tdata_t *tdata, void *arg)
{
tsd_t *tsd = (tsd_t *)arg;
prof_tdata_expire(tsd, tdata);
return (NULL);
return (prof_tdata_expire(tdata) ? tdata : NULL);
}
void
prof_reset(tsd_t *tsd, size_t lg_sample)
{
prof_tdata_t *next;
assert(lg_sample < (sizeof(uint64_t) << 3));
@ -1664,7 +1738,18 @@ prof_reset(tsd_t *tsd, size_t lg_sample)
malloc_mutex_lock(&tdatas_mtx);
lg_prof_sample = lg_sample;
tdata_tree_iter(&tdatas, NULL, prof_tdata_reset_iter, tsd);
next = NULL;
do {
prof_tdata_t *to_destroy = tdata_tree_iter(&tdatas, next,
prof_tdata_reset_iter, NULL);
if (to_destroy != NULL) {
next = tdata_tree_next(&tdatas, to_destroy);
tdata_tree_remove(&tdatas, to_destroy);
prof_tdata_destroy(tsd, to_destroy);
} else
next = NULL;
} while (next != NULL);
malloc_mutex_unlock(&tdatas_mtx);
malloc_mutex_unlock(&prof_dump_mtx);

238
test/unit/prof_reset.c Normal file
View File

@ -0,0 +1,238 @@
#include "test/jemalloc_test.h"
#ifdef JEMALLOC_PROF
const char *malloc_conf =
"prof: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);
}
TEST_BEGIN(test_prof_reset_basic)
{
size_t lg_prof_sample_orig, lg_prof_sample, lg_prof_sample_next;
size_t sz;
unsigned i;
sz = sizeof(size_t);
assert_d_eq(mallctl("opt.lg_prof_sample", &lg_prof_sample_orig, &sz,
NULL, 0), 0,
"Unexpected mallctl failure while reading profiling sample rate");
assert_zu_eq(lg_prof_sample_orig, 0,
"Unexpected profiling sample rate");
sz = sizeof(size_t);
assert_d_eq(mallctl("prof.lg_sample", &lg_prof_sample, &sz, NULL, 0), 0,
"Unexpected mallctl failure while reading profiling sample rate");
assert_zu_eq(lg_prof_sample_orig, lg_prof_sample,
"Unexpected disagreement between \"opt.lg_prof_sample\" and "
"\"prof.lg_sample\"");
/* Test simple resets. */
for (i = 0; i < 2; i++) {
assert_d_eq(mallctl("prof.reset", NULL, NULL, NULL, 0), 0,
"Unexpected mallctl failure while resetting profile data");
sz = sizeof(size_t);
assert_d_eq(mallctl("prof.lg_sample", &lg_prof_sample, &sz,
NULL, 0), 0, "Unexpected mallctl failure while reading "
"profiling sample rate");
assert_zu_eq(lg_prof_sample_orig, lg_prof_sample,
"Unexpected profile sample rate change");
}
/* Test resets with prof.lg_sample changes. */
lg_prof_sample_next = 1;
for (i = 0; i < 2; i++) {
assert_d_eq(mallctl("prof.reset", NULL, NULL,
&lg_prof_sample_next, sizeof(size_t)), 0,
"Unexpected mallctl failure while resetting profile data");
sz = sizeof(size_t);
assert_d_eq(mallctl("prof.lg_sample", &lg_prof_sample, &sz,
NULL, 0), 0, "Unexpected mallctl failure while reading "
"profiling sample rate");
assert_zu_eq(lg_prof_sample, lg_prof_sample_next,
"Expected profile sample rate change");
lg_prof_sample_next = lg_prof_sample_orig;
}
/* Make sure the test code restored prof.lg_sample. */
sz = sizeof(size_t);
assert_d_eq(mallctl("prof.lg_sample", &lg_prof_sample, &sz, NULL, 0), 0,
"Unexpected mallctl failure while reading profiling sample rate");
assert_zu_eq(lg_prof_sample_orig, lg_prof_sample,
"Unexpected disagreement between \"opt.lg_prof_sample\" and "
"\"prof.lg_sample\"");
}
TEST_END
bool prof_dump_header_intercepted = false;
prof_cnt_t cnt_all_copy = {0, 0, 0, 0};
static bool
prof_dump_header_intercept(bool propagate_err, const prof_cnt_t *cnt_all)
{
prof_dump_header_intercepted = true;
memcpy(&cnt_all_copy, cnt_all, sizeof(prof_cnt_t));
return (false);
}
TEST_BEGIN(test_prof_reset_cleanup)
{
bool active;
void *p;
prof_dump_header_t *prof_dump_header_orig;
active = true;
assert_d_eq(mallctl("prof.active", NULL, NULL, &active, sizeof(active)),
0, "Unexpected mallctl failure while activating profiling");
// XXX Verify that reset actually drops backtrace count to 0. Alloc an
// object, reset, check bt count, free. prof_bt_count() doesn't do the
// right thing; we need to iterate during dump and count backtraces.
// Or, just intercept prof_dump_header(), which has enough information
// for these purposes.
assert_zu_eq(prof_bt_count(), 0, "Expected 0 backtraces");
p = mallocx(1, 0);
assert_ptr_not_null(p, "Unexpected mallocx() failure");
assert_zu_eq(prof_bt_count(), 1, "Expected 1 backtrace");
prof_dump_header_orig = prof_dump_header;
prof_dump_header = prof_dump_header_intercept;
assert_false(prof_dump_header_intercepted, "Unexpected intercept");
assert_d_eq(mallctl("prof.dump", NULL, NULL, NULL, 0),
0, "Unexpected error while dumping heap profile");
assert_true(prof_dump_header_intercepted, "Expected intercept");
assert_u64_eq(cnt_all_copy.curobjs, 1, "Expected 1 allocation");
assert_d_eq(mallctl("prof.reset", NULL, NULL, NULL, 0), 0,
"Unexpected error while resetting heap profile data");
assert_d_eq(mallctl("prof.dump", NULL, NULL, NULL, 0),
0, "Unexpected error while dumping heap profile");
assert_u64_eq(cnt_all_copy.curobjs, 0, "Expected 0 allocations");
assert_zu_eq(prof_bt_count(), 1, "Expected 1 backtrace");
prof_dump_header = prof_dump_header_orig;
dallocx(p, 0);
assert_zu_eq(prof_bt_count(), 0, "Expected 0 backtraces");
active = false;
assert_d_eq(mallctl("prof.active", NULL, NULL, &active, sizeof(active)),
0, "Unexpected mallctl failure while deactivating profiling");
}
TEST_END
#define NTHREADS 4
#define NALLOCS_PER_THREAD (1U << 13)
#define OBJ_RING_BUF_COUNT 1531
#define RESET_INTERVAL (1U << 10)
#define DUMP_INTERVAL 3677
static void *
thd_start(void *varg)
{
unsigned thd_ind = *(unsigned *)varg;
unsigned i;
void *objs[OBJ_RING_BUF_COUNT];
memset(objs, 0, sizeof(objs));
for (i = 0; i < NALLOCS_PER_THREAD; i++) {
if (i % RESET_INTERVAL == 0) {
assert_d_eq(mallctl("prof.reset", NULL, NULL, NULL, 0),
0, "Unexpected error while resetting heap profile "
"data");
}
if (i % DUMP_INTERVAL == 0) {
assert_d_eq(mallctl("prof.dump", NULL, NULL, NULL, 0),
0, "Unexpected error while dumping heap profile");
}
{
void **pp = &objs[i % OBJ_RING_BUF_COUNT];
if (*pp != NULL) {
dallocx(*pp, 0);
*pp = NULL;
}
*pp = btalloc(1, thd_ind*NALLOCS_PER_THREAD + i);
assert_ptr_not_null(*pp,
"Unexpected btalloc() failure");
}
}
/* Clean up any remaining objects. */
for (i = 0; i < OBJ_RING_BUF_COUNT; i++) {
void **pp = &objs[i % OBJ_RING_BUF_COUNT];
if (*pp != NULL) {
dallocx(*pp, 0);
*pp = NULL;
}
}
return (NULL);
}
TEST_BEGIN(test_prof_reset)
{
bool active;
thd_t thds[NTHREADS];
unsigned thd_args[NTHREADS];
unsigned i;
size_t bt_count, tdata_count;
test_skip_if(!config_prof);
bt_count = prof_bt_count();
assert_zu_eq(bt_count, 0,
"Unexpected pre-existing tdata structures");
tdata_count = prof_tdata_count();
active = true;
assert_d_eq(mallctl("prof.active", NULL, NULL, &active, sizeof(active)),
0, "Unexpected mallctl failure while activating profiling");
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);
assert_zu_eq(prof_bt_count(), bt_count,
"Unexpected bactrace count change");
assert_zu_eq(prof_tdata_count(), tdata_count,
"Unexpected remaining tdata structures");
active = false;
assert_d_eq(mallctl("prof.active", NULL, NULL, &active, sizeof(active)),
0, "Unexpected mallctl failure while deactivating profiling");
}
TEST_END
#undef NTHREADS
#undef NALLOCS_PER_THREAD
#undef OBJ_RING_BUF_COUNT
#undef RESET_INTERVAL
#undef DUMP_INTERVAL
int
main(void)
{
/* Intercept dumping prior to running any tests. */
prof_dump_open = prof_dump_open_intercept;
return (test(
test_prof_reset_basic,
test_prof_reset_cleanup,
test_prof_reset));
}