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#define JEMALLOC_WITNESS_C_
#include "jemalloc/internal/jemalloc_internal.h"
void
witness_init(witness_t *witness, const char *name, witness_rank_t rank,
witness_comp_t *comp)
{
witness->name = name;
witness->rank = rank;
witness->comp = comp;
}
#ifdef JEMALLOC_JET
#undef witness_lock_error
#define witness_lock_error JEMALLOC_N(witness_lock_error_impl)
#endif
static void
witness_lock_error(const witness_list_t *witnesses, const witness_t *witness)
{
witness_t *w;
malloc_printf("<jemalloc>: Lock rank order reversal:");
ql_foreach(w, witnesses, link) {
malloc_printf(" %s(%u)", w->name, w->rank);
}
malloc_printf(" %s(%u)\n", witness->name, witness->rank);
abort();
}
#ifdef JEMALLOC_JET
#undef witness_lock_error
#define witness_lock_error JEMALLOC_N(witness_lock_error)
witness_lock_error_t *witness_lock_error = JEMALLOC_N(witness_lock_error_impl);
#endif
void
witness_lock(tsd_t *tsd, witness_t *witness)
{
witness_list_t *witnesses;
witness_t *w;
if (tsd == NULL)
return;
if (witness->rank == WITNESS_RANK_OMIT)
return;
witness_assert_not_owner(tsd, witness);
witnesses = tsd_witnessesp_get(tsd);
w = ql_last(witnesses, link);
if (w == NULL) {
/* No other locks; do nothing. */
} else if (tsd_witness_fork_get(tsd) && w->rank <= witness->rank) {
/* Forking, and relaxed ranking satisfied. */
} else if (w->rank > witness->rank) {
/* Not forking, rank order reversal. */
witness_lock_error(witnesses, witness);
} else if (w->rank == witness->rank && (w->comp == NULL || w->comp !=
witness->comp || w->comp(w, witness) > 0)) {
/*
* Missing/incompatible comparison function, or comparison
* function indicates rank order reversal.
*/
witness_lock_error(witnesses, witness);
}
ql_elm_new(witness, link);
ql_tail_insert(witnesses, witness, link);
}
void
witness_unlock(tsd_t *tsd, witness_t *witness)
{
witness_list_t *witnesses;
if (tsd == NULL)
return;
if (witness->rank == WITNESS_RANK_OMIT)
return;
witness_assert_owner(tsd, witness);
witnesses = tsd_witnessesp_get(tsd);
ql_remove(witnesses, witness, link);
}
#ifdef JEMALLOC_JET
#undef witness_owner_error
#define witness_owner_error JEMALLOC_N(witness_owner_error_impl)
#endif
static void
witness_owner_error(const witness_t *witness)
{
malloc_printf("<jemalloc>: Should own %s(%u)\n", witness->name,
witness->rank);
abort();
}
#ifdef JEMALLOC_JET
#undef witness_owner_error
#define witness_owner_error JEMALLOC_N(witness_owner_error)
witness_owner_error_t *witness_owner_error =
JEMALLOC_N(witness_owner_error_impl);
#endif
void
witness_assert_owner(tsd_t *tsd, const witness_t *witness)
{
witness_list_t *witnesses;
witness_t *w;
if (tsd == NULL)
return;
if (witness->rank == WITNESS_RANK_OMIT)
return;
witnesses = tsd_witnessesp_get(tsd);
ql_foreach(w, witnesses, link) {
if (w == witness)
return;
}
witness_owner_error(witness);
}
#ifdef JEMALLOC_JET
#undef witness_not_owner_error
#define witness_not_owner_error JEMALLOC_N(witness_not_owner_error_impl)
#endif
static void
witness_not_owner_error(const witness_t *witness)
{
malloc_printf("<jemalloc>: Should not own %s(%u)\n", witness->name,
witness->rank);
abort();
}
#ifdef JEMALLOC_JET
#undef witness_not_owner_error
#define witness_not_owner_error JEMALLOC_N(witness_not_owner_error)
witness_not_owner_error_t *witness_not_owner_error =
JEMALLOC_N(witness_not_owner_error_impl);
#endif
void
witness_assert_not_owner(tsd_t *tsd, const witness_t *witness)
{
witness_list_t *witnesses;
witness_t *w;
if (tsd == NULL)
return;
if (witness->rank == WITNESS_RANK_OMIT)
return;
witnesses = tsd_witnessesp_get(tsd);
ql_foreach(w, witnesses, link) {
if (w == witness)
witness_not_owner_error(witness);
}
}
#ifdef JEMALLOC_JET
#undef witness_lockless_error
#define witness_lockless_error JEMALLOC_N(witness_lockless_error_impl)
#endif
static void
witness_lockless_error(const witness_list_t *witnesses)
{
witness_t *w;
malloc_printf("<jemalloc>: Should not own any locks:");
ql_foreach(w, witnesses, link) {
malloc_printf(" %s(%u)", w->name, w->rank);
}
malloc_printf("\n");
abort();
}
#ifdef JEMALLOC_JET
#undef witness_lockless_error
#define witness_lockless_error JEMALLOC_N(witness_lockless_error)
witness_lockless_error_t *witness_lockless_error =
JEMALLOC_N(witness_lockless_error_impl);
#endif
void
witness_assert_lockless(tsd_t *tsd)
{
witness_list_t *witnesses;
witness_t *w;
if (tsd == NULL)
return;
witnesses = tsd_witnessesp_get(tsd);
w = ql_last(witnesses, link);
if (w != NULL) {
witness_lockless_error(witnesses);
}
}
void
witnesses_cleanup(tsd_t *tsd)
{
witness_assert_lockless(tsd);
/* Do nothing. */
}
void
witness_fork_cleanup(tsd_t *tsd)
{
/* Do nothing. */
}
void
witness_prefork(tsd_t *tsd)
{
tsd_witness_fork_set(tsd, true);
}
void
witness_postfork_parent(tsd_t *tsd)
{
tsd_witness_fork_set(tsd, false);
}
void
witness_postfork_child(tsd_t *tsd)
{
#ifndef JEMALLOC_MUTEX_INIT_CB
witness_list_t *witnesses;
witnesses = tsd_witnessesp_get(tsd);
ql_new(witnesses);
#endif
tsd_witness_fork_set(tsd, false);
}
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