From fb4e0f8726d2e3033164fe6e44c49351c6b641de Mon Sep 17 00:00:00 2001 From: Sverker Eriksson Date: Wed, 21 Dec 2016 17:41:43 +0100 Subject: erts: Make erts_dbg_within_proc available for debug assertions. --- erts/emulator/beam/erl_gc.c | 12 +++--------- erts/emulator/beam/erl_gc.h | 7 +++---- erts/emulator/hipe/hipe_gc.c | 6 +++--- 3 files changed, 9 insertions(+), 16 deletions(-) diff --git a/erts/emulator/beam/erl_gc.c b/erts/emulator/beam/erl_gc.c index 818f89f0e3..d907e7b351 100644 --- a/erts/emulator/beam/erl_gc.c +++ b/erts/emulator/beam/erl_gc.c @@ -3317,8 +3317,8 @@ erts_max_heap_size(Eterm arg, Uint *max_heap_size, Uint *max_heap_flags) #if defined(DEBUG) || defined(ERTS_OFFHEAP_DEBUG) -static int -within2(Eterm *ptr, Process *p, Eterm *real_htop) +int +erts_dbg_within_proc(Eterm *ptr, Process *p, Eterm *real_htop) { ErlHeapFragment* bp; ErtsMessage* mp; @@ -3362,12 +3362,6 @@ within2(Eterm *ptr, Process *p, Eterm *real_htop) return 0; } -int -within(Eterm *ptr, Process *p) -{ - return within2(ptr, p, NULL); -} - #endif #ifdef ERTS_OFFHEAP_DEBUG @@ -3422,7 +3416,7 @@ erts_check_off_heap2(Process *p, Eterm *htop) else if (oheap <= u.ep && u.ep < ohtop) old = 1; else { - ERTS_CHK_OFFHEAP_ASSERT(within2(u.ep, p, htop)); + ERTS_CHK_OFFHEAP_ASSERT(erts_dbg_within_proc(u.ep, p, htop)); } } diff --git a/erts/emulator/beam/erl_gc.h b/erts/emulator/beam/erl_gc.h index 54ea9ca3c0..9684478c1b 100644 --- a/erts/emulator/beam/erl_gc.h +++ b/erts/emulator/beam/erl_gc.h @@ -69,10 +69,6 @@ do { \ while (nelts--) *HTOP++ = *PTR++; \ } while(0) -#if defined(DEBUG) || defined(ERTS_OFFHEAP_DEBUG) -int within(Eterm *ptr, Process *p); -#endif - #define ErtsInYoungGen(TPtr, Ptr, OldHeap, OldHeapSz) \ (!erts_is_literal((TPtr), (Ptr)) \ & !ErtsInArea((Ptr), (OldHeap), (OldHeapSz))) @@ -157,5 +153,8 @@ void erts_offset_heap(Eterm*, Uint, Sint, Eterm*, Eterm*); void erts_free_heap_frags(struct process* p); Eterm erts_max_heap_size_map(Sint, Uint, Eterm **, Uint *); int erts_max_heap_size(Eterm, Uint *, Uint *); +#if defined(DEBUG) || defined(ERTS_OFFHEAP_DEBUG) +int erts_dbg_within_proc(Eterm *ptr, Process *p, Eterm* real_htop); +#endif #endif /* __ERL_GC_H__ */ diff --git a/erts/emulator/hipe/hipe_gc.c b/erts/emulator/hipe/hipe_gc.c index e6ce7ce628..cf0435adc9 100644 --- a/erts/emulator/hipe/hipe_gc.c +++ b/erts/emulator/hipe/hipe_gc.c @@ -99,7 +99,7 @@ Eterm *fullsweep_nstack(Process *p, Eterm *n_htop) if (IS_MOVED_CONS(val)) { *nsp_i = ptr[1]; } else if (!erts_is_literal(gval, ptr)) { - ASSERT(within(ptr, p)); + ASSERT(erts_dbg_within_proc(ptr, p, NULL)); MOVE_CONS(ptr, val, n_htop, nsp_i); } } @@ -208,7 +208,7 @@ void gensweep_nstack(Process *p, Eterm **ptr_old_htop, Eterm **ptr_n_htop) } else if (ErtsInArea(ptr, mature, mature_size)) { MOVE_BOXED(ptr, val, old_htop, nsp_i); } else if (ErtsInYoungGen(gval, ptr, oh, oh_size)) { - ASSERT(within(ptr, p)); + ASSERT(erts_dbg_within_proc(ptr, p, NULL)); MOVE_BOXED(ptr, val, n_htop, nsp_i); } } else if (is_list(gval)) { @@ -219,7 +219,7 @@ void gensweep_nstack(Process *p, Eterm **ptr_old_htop, Eterm **ptr_n_htop) } else if (ErtsInArea(ptr, mature, mature_size)) { MOVE_CONS(ptr, val, old_htop, nsp_i); } else if (ErtsInYoungGen(gval, ptr, oh, oh_size)) { - ASSERT(within(ptr, p)); + ASSERT(erts_dbg_within_proc(ptr, p, NULL)); MOVE_CONS(ptr, val, n_htop, nsp_i); } } -- cgit v1.2.3 From 9e9e7bf64fa97663dd4fb645c014880205fb46db Mon Sep 17 00:00:00 2001 From: Sverker Eriksson Date: Mon, 9 Jan 2017 15:13:58 +0100 Subject: erts: Add assertions for correct ErlNifEnv when constructing container terms. --- erts/emulator/beam/erl_nif.c | 107 +++++++++++++++++++++++++++++++++++++++++-- erts/emulator/beam/global.h | 7 +++ 2 files changed, 110 insertions(+), 4 deletions(-) diff --git a/erts/emulator/beam/erl_nif.c b/erts/emulator/beam/erl_nif.c index 5499512dd1..10514f6b3f 100644 --- a/erts/emulator/beam/erl_nif.c +++ b/erts/emulator/beam/erl_nif.c @@ -89,6 +89,14 @@ static void add_readonly_check(ErlNifEnv*, unsigned char* ptr, unsigned sz); # define ADD_READONLY_CHECK(ENV,PTR,SIZE) ((void)0) #endif +#ifdef ERTS_NIF_ASSERT_IN_ENV +# define ASSERT_IN_ENV(ENV, TERM, NR, TYPE) dbg_assert_in_env(ENV, TERM, NR, TYPE, __func__) +static void dbg_assert_in_env(ErlNifEnv*, Eterm term, int nr, const char* type, const char* func); +# include "erl_gc.h" +#else +# define ASSERT_IN_ENV(ENV, TERM, NR, TYPE) +#endif + #ifdef DEBUG static int is_offheap(const ErlOffHeap* off_heap); #endif @@ -196,6 +204,9 @@ void erts_pre_nif(ErlNifEnv* env, Process* p, struct erl_module_nif* mod_nif, ASSERT(p->common.id != ERTS_INVALID_PID); +#ifdef ERTS_NIF_ASSERT_IN_ENV + env->dbg_disable_assert_in_env = 0; +#endif #if defined(DEBUG) && defined(ERTS_DIRTY_SCHEDULERS) { ErtsSchedulerData *esdp = erts_get_scheduler_data(); @@ -474,11 +485,15 @@ setup_nif_env(struct enif_msg_environment_t* msg_env, HEAP_END(&msg_env->phony_proc) = phony_heap; MBUF(&msg_env->phony_proc) = NULL; msg_env->phony_proc.common.id = ERTS_INVALID_PID; + msg_env->env.tracee = tracee; + #ifdef FORCE_HEAP_FRAGS msg_env->phony_proc.space_verified = 0; msg_env->phony_proc.space_verified_from = NULL; #endif - msg_env->env.tracee = tracee; +#ifdef ERTS_NIF_ASSERT_IN_ENV + msg_env->env.dbg_disable_assert_in_env = 0; +#endif } ErlNifEnv* enif_alloc_env(void) @@ -1586,6 +1601,9 @@ int enif_make_existing_atom_len(ErlNifEnv* env, const char* name, size_t len, ERL_NIF_TERM enif_make_tuple(ErlNifEnv* env, unsigned cnt, ...) { +#ifdef ERTS_NIF_ASSERT_IN_ENV + int nr = 0; +#endif Eterm* hp = alloc_heap(env,cnt+1); Eterm ret = make_tuple(hp); va_list ap; @@ -1593,7 +1611,9 @@ ERL_NIF_TERM enif_make_tuple(ErlNifEnv* env, unsigned cnt, ...) *hp++ = make_arityval(cnt); va_start(ap,cnt); while (cnt--) { - *hp++ = va_arg(ap,Eterm); + Eterm elem = va_arg(ap,Eterm); + ASSERT_IN_ENV(env, elem, ++nr, "tuple"); + *hp++ = elem; } va_end(ap); return ret; @@ -1601,12 +1621,16 @@ ERL_NIF_TERM enif_make_tuple(ErlNifEnv* env, unsigned cnt, ...) ERL_NIF_TERM enif_make_tuple_from_array(ErlNifEnv* env, const ERL_NIF_TERM arr[], unsigned cnt) { +#ifdef ERTS_NIF_ASSERT_IN_ENV + int nr = 0; +#endif Eterm* hp = alloc_heap(env,cnt+1); Eterm ret = make_tuple(hp); const Eterm* src = arr; *hp++ = make_arityval(cnt); while (cnt--) { + ASSERT_IN_ENV(env, *src, ++nr, "tuple"); *hp++ = *src++; } return ret; @@ -1617,6 +1641,8 @@ ERL_NIF_TERM enif_make_list_cell(ErlNifEnv* env, Eterm car, Eterm cdr) Eterm* hp = alloc_heap(env,2); Eterm ret = make_list(hp); + ASSERT_IN_ENV(env, car, 0, "head of list cell"); + ASSERT_IN_ENV(env, cdr, 0, "tail of list cell"); CAR(hp) = car; CDR(hp) = cdr; return ret; @@ -1628,6 +1654,9 @@ ERL_NIF_TERM enif_make_list(ErlNifEnv* env, unsigned cnt, ...) return NIL; } else { +#ifdef ERTS_NIF_ASSERT_IN_ENV + int nr = 0; +#endif Eterm* hp = alloc_heap(env,cnt*2); Eterm ret = make_list(hp); Eterm* last = &ret; @@ -1635,8 +1664,10 @@ ERL_NIF_TERM enif_make_list(ErlNifEnv* env, unsigned cnt, ...) va_start(ap,cnt); while (cnt--) { + Eterm term = va_arg(ap,Eterm); *last = make_list(hp); - *hp = va_arg(ap,Eterm); + ASSERT_IN_ENV(env, term, ++nr, "list"); + *hp = term; last = ++hp; ++hp; } @@ -1648,14 +1679,19 @@ ERL_NIF_TERM enif_make_list(ErlNifEnv* env, unsigned cnt, ...) ERL_NIF_TERM enif_make_list_from_array(ErlNifEnv* env, const ERL_NIF_TERM arr[], unsigned cnt) { +#ifdef ERTS_NIF_ASSERT_IN_ENV + int nr = 0; +#endif Eterm* hp = alloc_heap(env,cnt*2); Eterm ret = make_list(hp); Eterm* last = &ret; const Eterm* src = arr; while (cnt--) { + Eterm term = *src++; *last = make_list(hp); - *hp = *src++; + ASSERT_IN_ENV(env, term, ++nr, "list"); + *hp = term; last = ++hp; ++hp; } @@ -2789,6 +2825,10 @@ int enif_make_map_put(ErlNifEnv* env, if (!is_map(map_in)) { return 0; } + ASSERT_IN_ENV(env, map_in, 0, "old map"); + ASSERT_IN_ENV(env, key, 0, "key"); + ASSERT_IN_ENV(env, value, 0, "value"); + flush_env(env); *map_out = erts_maps_put(env->proc, key, value, map_in); cache_env(env); @@ -2823,6 +2863,10 @@ int enif_make_map_update(ErlNifEnv* env, return 0; } + ASSERT_IN_ENV(env, map_in, 0, "old map"); + ASSERT_IN_ENV(env, key, 0, "key"); + ASSERT_IN_ENV(env, value, 0, "value"); + flush_env(env); res = erts_maps_update(env->proc, key, value, map_in, map_out); cache_env(env); @@ -3543,6 +3587,9 @@ Eterm erts_nif_call_function(Process *p, Process *tracee, clear_offheap(&MSO(p)); erts_pre_nif(&env, p, mod, tracee); +#ifdef ERTS_NIF_ASSERT_IN_ENV + env.dbg_disable_assert_in_env = 1; +#endif nif_result = (*fun->fptr)(&env, argc, argv); if (env.exception_thrown) nif_result = THE_NON_VALUE; @@ -3565,6 +3612,9 @@ Eterm erts_nif_call_function(Process *p, Process *tracee, so we create a phony one. */ struct enif_msg_environment_t msg_env; pre_nif_noproc(&msg_env, mod, tracee); +#ifdef ERTS_NIF_ASSERT_IN_ENV + msg_env.env.dbg_disable_assert_in_env = 1; +#endif nif_result = (*fun->fptr)(&msg_env.env, argc, argv); if (msg_env.env.exception_thrown) nif_result = THE_NON_VALUE; @@ -3629,6 +3679,55 @@ static unsigned calc_checksum(unsigned char* ptr, unsigned size) #endif /* READONLY_CHECK */ +#ifdef ERTS_NIF_ASSERT_IN_ENV +static void dbg_assert_in_env(ErlNifEnv* env, Eterm term, + int nr, const char* type, const char* func) +{ + Uint saved_used_size; + Eterm* real_htop; + + if (is_immed(term) + || (is_non_value(term) && env->exception_thrown) + || erts_is_literal(term, ptr_val(term))) + return; + + if (env->dbg_disable_assert_in_env) { + /* + * Trace nifs may cheat as built terms are discarded after return. + * ToDo: Check if 'term' is part of argv[]. + */ + return; + } + + if (env->heap_frag) { + ASSERT(env->heap_frag == MBUF(env->proc)); + ASSERT(env->hp >= env->heap_frag->mem); + ASSERT(env->hp <= env->heap_frag->mem + env->heap_frag->alloc_size); + saved_used_size = env->heap_frag->used_size; + env->heap_frag->used_size = env->hp - env->heap_frag->mem; + real_htop = NULL; + } + else { + real_htop = env->hp; + } + if (!erts_dbg_within_proc(ptr_val(term), env->proc, real_htop)) { + fprintf(stderr, "\r\nFAILED ASSERTION in %s:\r\n", func); + if (nr) { + fprintf(stderr, "Term #%d of the %s is not from same ErlNifEnv.", + nr, type); + } + else { + fprintf(stderr, "The %s is not from the same ErlNifEnv.", type); + } + fprintf(stderr, "\r\nABORTING\r\n"); + abort(); + } + if (env->heap_frag) { + env->heap_frag->used_size = saved_used_size; + } +} +#endif + #ifdef HAVE_USE_DTRACE #define MESSAGE_BUFSIZ 1024 diff --git a/erts/emulator/beam/global.h b/erts/emulator/beam/global.h index 2b2f3c5cdc..5d07490152 100644 --- a/erts/emulator/beam/global.h +++ b/erts/emulator/beam/global.h @@ -45,6 +45,9 @@ struct enif_func_t; +#ifdef DEBUG +# define ERTS_NIF_ASSERT_IN_ENV +#endif struct enif_environment_t /* ErlNifEnv */ { struct erl_module_nif* mod_nif; @@ -57,6 +60,10 @@ struct enif_environment_t /* ErlNifEnv */ int exception_thrown; /* boolean */ Process *tracee; int exiting; /* boolean (dirty nifs might return in exiting state) */ + +#ifdef ERTS_NIF_ASSERT_IN_ENV + int dbg_disable_assert_in_env; +#endif }; extern void erts_pre_nif(struct enif_environment_t*, Process*, struct erl_module_nif*, Process* tracee); -- cgit v1.2.3 From 10ace079fb6d0d626a16a5c6726c6bb8e6bb3878 Mon Sep 17 00:00:00 2001 From: Sverker Eriksson Date: Wed, 21 Dec 2016 17:43:28 +0100 Subject: erts: Cleanup enif_make_reverse_list --- erts/emulator/beam/erl_nif.c | 10 +++------- 1 file changed, 3 insertions(+), 7 deletions(-) diff --git a/erts/emulator/beam/erl_nif.c b/erts/emulator/beam/erl_nif.c index 10514f6b3f..cd44eb880e 100644 --- a/erts/emulator/beam/erl_nif.c +++ b/erts/emulator/beam/erl_nif.c @@ -1724,13 +1724,9 @@ void enif_system_info(ErlNifSysInfo *sip, size_t si_size) driver_system_info(sip, si_size); } -int enif_make_reverse_list(ErlNifEnv* env, ERL_NIF_TERM term, ERL_NIF_TERM *list) { - Eterm *listptr, ret = NIL, *hp; - - if (is_nil(term)) { - *list = term; - return 1; - } +int enif_make_reverse_list(ErlNifEnv* env, ERL_NIF_TERM term, ERL_NIF_TERM *list) +{ + Eterm *listptr, ret, *hp; ret = NIL; -- cgit v1.2.3 From 1239d92556cc0a7921648cbd4abd9f9a397b29b8 Mon Sep 17 00:00:00 2001 From: Sverker Eriksson Date: Wed, 21 Dec 2016 18:12:14 +0100 Subject: erts: Cleanup and extra assertions in nif_SUITE.c --- erts/emulator/test/nif_SUITE_data/nif_SUITE.c | 17 +++++++++++++---- 1 file changed, 13 insertions(+), 4 deletions(-) diff --git a/erts/emulator/test/nif_SUITE_data/nif_SUITE.c b/erts/emulator/test/nif_SUITE_data/nif_SUITE.c index 2c93891852..4decb7f418 100644 --- a/erts/emulator/test/nif_SUITE_data/nif_SUITE.c +++ b/erts/emulator/test/nif_SUITE_data/nif_SUITE.c @@ -116,7 +116,6 @@ static ERL_NIF_TERM make_pointer(ErlNifEnv* env, void* p) { void** bin_data; ERL_NIF_TERM res; - ADD_CALL("get_priv_data_ptr"); bin_data = (void**)enif_make_new_binary(env, sizeof(void*), &res); *bin_data = p; return res; @@ -389,8 +388,7 @@ static ERL_NIF_TERM type_test(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[ ErlNifSInt64 sint64; ErlNifUInt64 uint64; double d; - ERL_NIF_TERM atom, ref1, ref2, term; - size_t len; + ERL_NIF_TERM atom, ref1, ref2; sint = INT_MIN; do { @@ -1024,6 +1022,7 @@ struct make_term_info { ErlNifEnv* caller_env; ErlNifEnv* dst_env; + int dst_env_valid; ERL_NIF_TERM reuse[MAKE_TERM_REUSE_LEN]; unsigned reuse_push; unsigned reuse_pull; @@ -1053,6 +1052,7 @@ static ERL_NIF_TERM pull_term(struct make_term_info* mti) mti->reuse_push < MAKE_TERM_REUSE_LEN) { mti->reuse_pull = 0; if (mti->reuse_push == 0) { + assert(mti->dst_env_valid); mti->reuse[0] = enif_make_list(mti->dst_env, 0); } } @@ -1241,6 +1241,7 @@ static unsigned num_of_make_funcs() static int make_term_n(struct make_term_info* mti, int n, ERL_NIF_TERM* res) { if (n < num_of_make_funcs()) { + assert(mti->dst_env_valid); *res = make_funcs[n](mti, n); push_term(mti, *res); return 1; @@ -1257,6 +1258,7 @@ static ERL_NIF_TERM make_blob(ErlNifEnv* caller_env, ErlNifEnv* dst_env, struct make_term_info mti; mti.caller_env = caller_env; mti.dst_env = dst_env; + mti.dst_env_valid = 1; mti.reuse_push = 0; mti.reuse_pull = 0; mti.resource_type = priv->rt_arr[0].t; @@ -1297,6 +1299,7 @@ static ERL_NIF_TERM alloc_msgenv(ErlNifEnv* env, int argc, const ERL_NIF_TERM ar sizeof(*mti)); mti->caller_env = NULL; mti->dst_env = enif_alloc_env(); + mti->dst_env_valid = 1; mti->reuse_push = 0; mti->reuse_pull = 0; mti->resource_type = priv->rt_arr[0].t; @@ -1328,6 +1331,7 @@ static ERL_NIF_TERM clear_msgenv(ErlNifEnv* env, int argc, const ERL_NIF_TERM ar return enif_make_badarg(env); } enif_clear_env(mti.p->dst_env); + mti.p->dst_env_valid = 1; mti.p->reuse_pull = 0; mti.p->reuse_push = 0; mti.p->blob = enif_make_list(mti.p->dst_env, 0); @@ -1362,6 +1366,8 @@ static ERL_NIF_TERM send_blob(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[ } copy = enif_make_copy(env, mti.p->blob); res = enif_send(env, &to, mti.p->dst_env, mti.p->blob); + if (res) + mti.p->dst_env_valid = 0; return enif_make_tuple3(env, atom_ok, enif_make_int(env,res), copy); } @@ -1369,7 +1375,6 @@ static ERL_NIF_TERM send3_blob(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv { mti_t mti; ErlNifPid to; - ERL_NIF_TERM copy; int res; if (!enif_get_resource(env, argv[0], msgenv_resource_type, &mti.vp) || !enif_get_local_pid(env, argv[1], &to)) { @@ -1379,6 +1384,8 @@ static ERL_NIF_TERM send3_blob(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv enif_make_copy(mti.p->dst_env, argv[2]), mti.p->blob); res = enif_send(env, &to, mti.p->dst_env, mti.p->blob); + if (res) + mti.p->dst_env_valid = 0; return enif_make_int(env,res); } @@ -1395,6 +1402,8 @@ void* threaded_sender(void *arg) mti.p->send_it = 0; enif_mutex_unlock(mti.p->mtx); mti.p->send_res = enif_send(NULL, &mti.p->to_pid, mti.p->dst_env, mti.p->blob); + if (mti.p->send_res) + mti.p->dst_env_valid = 0; return NULL; } -- cgit v1.2.3 From 9e862df2bf26b9b1d79ba3b447945b7c0612e3d0 Mon Sep 17 00:00:00 2001 From: Sverker Eriksson Date: Thu, 12 Jan 2017 18:12:38 +0100 Subject: erts: Add macro ERTS_PROC_LOCKS_HIGHER_THAN to safeguard against bugs due to future proc lock changes. The two places now using ERTS_PROC_LOCKS_HIGHER_THAN were kind of bugs as BTM and TRACE locks were missing. But there was probably no way to get there with BTM or TRACE locked. --- erts/emulator/beam/erl_message.c | 10 ++++++---- erts/emulator/beam/erl_process_lock.h | 4 ++++ 2 files changed, 10 insertions(+), 4 deletions(-) diff --git a/erts/emulator/beam/erl_message.c b/erts/emulator/beam/erl_message.c index 118adc0c1b..04f9640a17 100644 --- a/erts/emulator/beam/erl_message.c +++ b/erts/emulator/beam/erl_message.c @@ -285,9 +285,11 @@ erts_queue_dist_message(Process *rcvr, if (!(rcvr_locks & ERTS_PROC_LOCK_MSGQ)) { if (erts_smp_proc_trylock(rcvr, ERTS_PROC_LOCK_MSGQ) == EBUSY) { ErtsProcLocks need_locks = ERTS_PROC_LOCK_MSGQ; - if (rcvr_locks & ERTS_PROC_LOCK_STATUS) { - erts_smp_proc_unlock(rcvr, ERTS_PROC_LOCK_STATUS); - need_locks |= ERTS_PROC_LOCK_STATUS; + ErtsProcLocks unlocks = + rcvr_locks & ERTS_PROC_LOCKS_HIGHER_THAN(ERTS_PROC_LOCK_MSGQ); + if (unlocks) { + erts_smp_proc_unlock(rcvr, unlocks); + need_locks |= unlocks; } erts_smp_proc_lock(rcvr, need_locks); } @@ -406,7 +408,7 @@ queue_messages(Process* receiver, if (state & (ERTS_PSFLG_EXITING|ERTS_PSFLG_PENDING_EXIT)) goto exiting; - need_locks = receiver_locks & (ERTS_PROC_LOCK_STATUS|ERTS_PROC_LOCK_TRACE); + need_locks = receiver_locks & ERTS_PROC_LOCKS_HIGHER_THAN(ERTS_PROC_LOCK_MSGQ); if (need_locks) { erts_smp_proc_unlock(receiver, need_locks); } diff --git a/erts/emulator/beam/erl_process_lock.h b/erts/emulator/beam/erl_process_lock.h index 2cccf0697a..e7d68f0a09 100644 --- a/erts/emulator/beam/erl_process_lock.h +++ b/erts/emulator/beam/erl_process_lock.h @@ -219,6 +219,10 @@ typedef struct erts_proc_lock_t_ { #define ERTS_PROC_LOCKS_ALL_MINOR (ERTS_PROC_LOCKS_ALL \ & ~ERTS_PROC_LOCK_MAIN) +/* All locks we first must unlock to lock L */ +#define ERTS_PROC_LOCKS_HIGHER_THAN(L) \ + (ERTS_PROC_LOCKS_ALL & (~(L) & ~((L)-1))) + #define ERTS_PIX_LOCKS_BITS 10 #define ERTS_NO_OF_PIX_LOCKS (1 << ERTS_PIX_LOCKS_BITS) -- cgit v1.2.3