aboutsummaryrefslogtreecommitdiffstats
path: root/erts/emulator/beam/beam_bif_load.c
diff options
context:
space:
mode:
Diffstat (limited to 'erts/emulator/beam/beam_bif_load.c')
-rw-r--r--erts/emulator/beam/beam_bif_load.c761
1 files changed, 508 insertions, 253 deletions
diff --git a/erts/emulator/beam/beam_bif_load.c b/erts/emulator/beam/beam_bif_load.c
index 78a9d76a20..768c38dae1 100644
--- a/erts/emulator/beam/beam_bif_load.c
+++ b/erts/emulator/beam/beam_bif_load.c
@@ -37,25 +37,83 @@
static void set_default_trace_pattern(Eterm module);
static Eterm check_process_code(Process* rp, Module* modp);
-static void delete_code(Process *c_p, ErtsProcLocks c_p_locks, Module* modp);
-static void delete_export_references(Eterm module);
-static int purge_module(int module);
+static void delete_code(Module* modp);
static void decrement_refc(BeamInstr* code);
static int is_native(BeamInstr* code);
static int any_heap_ref_ptrs(Eterm* start, Eterm* end, char* mod_start, Uint mod_size);
static int any_heap_refs(Eterm* start, Eterm* end, char* mod_start, Uint mod_size);
-static void remove_from_address_table(BeamInstr* code);
-Eterm
-load_module_2(BIF_ALIST_2)
+
+
+BIF_RETTYPE code_is_module_native_1(BIF_ALIST_1)
{
- Eterm reason;
- Eterm* hp;
- int sz;
- byte* code;
+ Module* modp;
Eterm res;
+ ErtsCodeIndex code_ix;
+
+ if (is_not_atom(BIF_ARG_1)) {
+ BIF_ERROR(BIF_P, BADARG);
+ }
+ code_ix = erts_active_code_ix();
+ if ((modp = erts_get_module(BIF_ARG_1, code_ix)) == NULL) {
+ return am_undefined;
+ }
+ erts_rlock_old_code(code_ix);
+ res = ((modp->curr.code && is_native(modp->curr.code)) ||
+ (modp->old.code != 0 && is_native(modp->old.code))) ?
+ am_true : am_false;
+ erts_runlock_old_code(code_ix);
+ return res;
+}
+
+BIF_RETTYPE code_make_stub_module_3(BIF_ALIST_3)
+{
+ Module* modp;
+ Eterm res;
+
+ if (!erts_try_seize_code_write_permission(BIF_P)) {
+ ERTS_BIF_YIELD3(bif_export[BIF_code_make_stub_module_3],
+ BIF_P, BIF_ARG_1, BIF_ARG_2, BIF_ARG_3);
+ }
+
+ erts_smp_proc_unlock(BIF_P, ERTS_PROC_LOCK_MAIN);
+ erts_smp_thr_progress_block();
+
+ modp = erts_get_module(BIF_ARG_1, erts_active_code_ix());
+
+ if (modp && modp->curr.num_breakpoints > 0) {
+ ASSERT(modp->curr.code != NULL);
+ erts_clear_module_break(modp);
+ ASSERT(modp->curr.num_breakpoints == 0);
+ }
+
+ erts_start_staging_code_ix();
+
+ res = erts_make_stub_module(BIF_P, BIF_ARG_1, BIF_ARG_2, BIF_ARG_3);
+
+ if (res == BIF_ARG_1) {
+ erts_end_staging_code_ix();
+ erts_commit_staging_code_ix();
+ }
+ else {
+ erts_abort_staging_code_ix();
+ }
+ erts_smp_thr_progress_unblock();
+ erts_smp_proc_lock(BIF_P, ERTS_PROC_LOCK_MAIN);
+ erts_release_code_write_permission();
+ return res;
+}
+
+BIF_RETTYPE
+prepare_loading_2(BIF_ALIST_2)
+{
byte* temp_alloc = NULL;
- struct LoaderState* stp;
+ byte* code;
+ Uint sz;
+ Binary* magic;
+ Eterm reason;
+ Eterm* hp;
+ Eterm res;
if (is_not_atom(BIF_ARG_1)) {
error:
@@ -65,108 +123,277 @@ load_module_2(BIF_ALIST_2)
if ((code = erts_get_aligned_binary_bytes(BIF_ARG_2, &temp_alloc)) == NULL) {
goto error;
}
- hp = HAlloc(BIF_P, 3);
- /*
- * Read the BEAM file and prepare the module for loading.
- */
- stp = erts_alloc_loader_state();
+ magic = erts_alloc_loader_state();
sz = binary_size(BIF_ARG_2);
- reason = erts_prepare_loading(stp, BIF_P, BIF_P->group_leader,
+ reason = erts_prepare_loading(magic, BIF_P, BIF_P->group_leader,
&BIF_ARG_1, code, sz);
erts_free_aligned_binary_bytes(temp_alloc);
if (reason != NIL) {
+ hp = HAlloc(BIF_P, 3);
res = TUPLE2(hp, am_error, reason);
BIF_RET(res);
}
+ hp = HAlloc(BIF_P, PROC_BIN_SIZE);
+ res = erts_mk_magic_binary_term(&hp, &MSO(BIF_P), magic);
+ erts_refc_dec(&magic->refc, 1);
+ BIF_RET(res);
+}
- /*
- * Stop all other processes and finish the loading of the module.
- */
- erts_smp_proc_unlock(BIF_P, ERTS_PROC_LOCK_MAIN);
- erts_smp_thr_progress_block();
+struct m {
+ Binary* code;
+ Eterm module;
+ Module* modp;
+ Uint exception;
+};
- reason = erts_finish_loading(stp, BIF_P, 0, &BIF_ARG_1);
- if (reason != NIL) {
- res = TUPLE2(hp, am_error, reason);
- } else {
- set_default_trace_pattern(BIF_ARG_1);
- res = TUPLE2(hp, am_module, BIF_ARG_1);
- }
+static Eterm staging_epilogue(Process* c_p, int, Eterm res, int, struct m*, int);
- erts_smp_thr_progress_unblock();
- erts_smp_proc_lock(BIF_P, ERTS_PROC_LOCK_MAIN);
- BIF_RET(res);
+static Eterm
+exception_list(Process* p, Eterm tag, struct m* mp, Sint exceptions)
+{
+ Eterm* hp = HAlloc(p, 3 + 2*exceptions);
+ Eterm res = NIL;
+
+ mp += exceptions - 1;
+ while (exceptions > 0) {
+ if (mp->exception) {
+ res = CONS(hp, mp->module, res);
+ hp += 2;
+ exceptions--;
+ }
+ mp--;
+ }
+ return TUPLE2(hp, tag, res);
}
-BIF_RETTYPE purge_module_1(BIF_ALIST_1)
+
+BIF_RETTYPE
+finish_loading_1(BIF_ALIST_1)
{
- int purge_res;
+ int i;
+ int n;
+ struct m* p = NULL;
+ Uint exceptions;
+ Eterm res;
+ int is_blocking = 0;
+ int do_commit = 0;
- if (is_not_atom(BIF_ARG_1)) {
- BIF_ERROR(BIF_P, BADARG);
+ if (!erts_try_seize_code_write_permission(BIF_P)) {
+ ERTS_BIF_YIELD1(bif_export[BIF_finish_loading_1], BIF_P, BIF_ARG_1);
}
- erts_smp_proc_unlock(BIF_P, ERTS_PROC_LOCK_MAIN);
- erts_smp_thr_progress_block();
+ /*
+ * Validate the argument before we start loading; it must be a
+ * proper list where each element is a magic binary containing
+ * prepared (not previously loaded) code.
+ *
+ * First count the number of elements and allocate an array
+ * to keep the elements in.
+ */
- erts_export_consolidate();
- purge_res = purge_module(atom_val(BIF_ARG_1));
+ n = list_length(BIF_ARG_1);
+ if (n == -1) {
+ ERTS_BIF_PREP_ERROR(res, BIF_P, BADARG);
+ goto done;
+ }
+ p = erts_alloc(ERTS_ALC_T_LOADER_TMP, n*sizeof(struct m));
- erts_smp_thr_progress_unblock();
- erts_smp_proc_lock(BIF_P, ERTS_PROC_LOCK_MAIN);
+ /*
+ * We now know that the argument is a proper list. Validate
+ * and collect the binaries into the array.
+ */
- if (purge_res < 0) {
- BIF_ERROR(BIF_P, BADARG);
+ for (i = 0; i < n; i++) {
+ Eterm* cons = list_val(BIF_ARG_1);
+ Eterm term = CAR(cons);
+ ProcBin* pb;
+
+ if (!ERTS_TERM_IS_MAGIC_BINARY(term)) {
+ ERTS_BIF_PREP_ERROR(res, BIF_P, BADARG);
+ goto done;
+ }
+ pb = (ProcBin*) binary_val(term);
+ p[i].code = pb->val;
+ p[i].module = erts_module_for_prepared_code(p[i].code);
+ if (p[i].module == NIL) {
+ ERTS_BIF_PREP_ERROR(res, BIF_P, BADARG);
+ goto done;
+ }
+ BIF_ARG_1 = CDR(cons);
}
- BIF_RET(am_true);
-}
-BIF_RETTYPE code_is_module_native_1(BIF_ALIST_1)
-{
- Module* modp;
+ /*
+ * Since we cannot handle atomic loading of a group of modules
+ * if one or more of them uses on_load, we will only allow one
+ * element in the list. This limitation is intended to be
+ * lifted in the future.
+ */
- if (is_not_atom(BIF_ARG_1)) {
- BIF_ERROR(BIF_P, BADARG);
+ if (n > 1) {
+ ERTS_BIF_PREP_ERROR(res, BIF_P, SYSTEM_LIMIT);
+ goto done;
}
- if ((modp = erts_get_module(BIF_ARG_1)) == NULL) {
- return am_undefined;
+
+ /*
+ * All types are correct. There cannot be a BADARG from now on.
+ * Before we can start loading, we must check whether any of
+ * the modules already has old code. To avoid a race, we must
+ * not allow other process to initiate a code loading operation
+ * from now on.
+ */
+
+ res = am_ok;
+ erts_start_staging_code_ix();
+
+ for (i = 0; i < n; i++) {
+ p[i].modp = erts_put_module(p[i].module);
+ }
+ for (i = 0; i < n; i++) {
+ if (p[i].modp->curr.num_breakpoints > 0 ||
+ p[i].modp->curr.num_traced_exports > 0 ||
+ erts_is_default_trace_enabled()) {
+ /* tracing involved, fallback with thread blocking */
+ erts_smp_proc_unlock(BIF_P, ERTS_PROC_LOCK_MAIN);
+ erts_smp_thr_progress_block();
+ is_blocking = 1;
+ break;
+ }
}
- return ((modp->code && is_native(modp->code)) ||
- (modp->old_code != 0 && is_native(modp->old_code))) ?
- am_true : am_false;
-}
-BIF_RETTYPE code_make_stub_module_3(BIF_ALIST_3)
-{
- Eterm res;
+ if (is_blocking) {
+ for (i = 0; i < n; i++) {
+ if (p[i].modp->curr.num_breakpoints) {
+ erts_clear_module_break(p[i].modp);
+ ASSERT(p[i].modp->curr.num_breakpoints == 0);
+ }
+ }
+ }
- erts_smp_proc_unlock(BIF_P, ERTS_PROC_LOCK_MAIN);
- erts_smp_thr_progress_block();
+ exceptions = 0;
+ for (i = 0; i < n; i++) {
+ p[i].exception = 0;
+ if (p[i].modp->curr.code && p[i].modp->old.code) {
+ p[i].exception = 1;
+ exceptions++;
+ }
+ }
- erts_export_consolidate();
- res = erts_make_stub_module(BIF_P, BIF_ARG_1, BIF_ARG_2, BIF_ARG_3);
+ if (exceptions) {
+ res = exception_list(BIF_P, am_not_purged, p, exceptions);
+ } else {
+ /*
+ * Now we can load all code. This can't fail.
+ */
- erts_smp_thr_progress_unblock();
- erts_smp_proc_lock(BIF_P, ERTS_PROC_LOCK_MAIN);
- return res;
+ exceptions = 0;
+ for (i = 0; i < n; i++) {
+ Eterm mod;
+ Eterm retval;
+
+ erts_refc_inc(&p[i].code->refc, 1);
+ retval = erts_finish_loading(p[i].code, BIF_P, 0, &mod);
+ ASSERT(retval == NIL || retval == am_on_load);
+ if (retval == am_on_load) {
+ p[i].exception = 1;
+ exceptions++;
+ }
+ }
+
+ /*
+ * Check whether any module has an on_load_handler.
+ */
+
+ if (exceptions) {
+ res = exception_list(BIF_P, am_on_load, p, exceptions);
+ }
+ do_commit = 1;
+ }
+
+done:
+ return staging_epilogue(BIF_P, do_commit, res, is_blocking, p, n);
+}
+
+static Eterm
+staging_epilogue(Process* c_p, int commit, Eterm res, int is_blocking,
+ struct m* loaded, int nloaded)
+{
+#ifdef ERTS_SMP
+ if (is_blocking || !commit)
+#endif
+ {
+ if (commit) {
+ erts_end_staging_code_ix();
+ erts_commit_staging_code_ix();
+ if (loaded) {
+ int i;
+ for (i=0; i < nloaded; i++) {
+ set_default_trace_pattern(loaded[i].module);
+ }
+ }
+ }
+ else {
+ erts_abort_staging_code_ix();
+ }
+ if (loaded) {
+ erts_free(ERTS_ALC_T_LOADER_TMP, loaded);
+ }
+ if (is_blocking) {
+ erts_smp_thr_progress_unblock();
+ erts_smp_proc_lock(c_p, ERTS_PROC_LOCK_MAIN);
+ }
+ erts_release_code_write_permission();
+ return res;
+ }
+#ifdef ERTS_SMP
+ else {
+ ErtsThrPrgrVal later;
+ ASSERT(is_value(res));
+
+ if (loaded) {
+ erts_free(ERTS_ALC_T_LOADER_TMP, loaded);
+ }
+ erts_end_staging_code_ix();
+ /*
+ * Now we must wait for all schedulers to do a memory barrier before
+ * we can activate and let them access the new staged code. This allows
+ * schedulers to read active code_ix in a safe way while executing
+ * without any memory barriers at all.
+ */
+
+ later = erts_thr_progress_later();
+ erts_thr_progress_wakeup(c_p->scheduler_data, later);
+ erts_notify_code_ix_activation(c_p, later);
+ erts_suspend(c_p, ERTS_PROC_LOCK_MAIN, NULL);
+ /*
+ * handle_code_ix_activation() will do the rest "later"
+ * and resume this process to return 'res'.
+ */
+ ERTS_BIF_YIELD_RETURN(c_p, res);
+ }
+#endif
}
BIF_RETTYPE
check_old_code_1(BIF_ALIST_1)
{
+ ErtsCodeIndex code_ix;
Module* modp;
+ Eterm res = am_false;
if (is_not_atom(BIF_ARG_1)) {
BIF_ERROR(BIF_P, BADARG);
}
- modp = erts_get_module(BIF_ARG_1);
- if (modp == NULL) { /* Doesn't exist. */
- BIF_RET(am_false);
- } else if (modp->old_code == NULL) { /* No old code. */
- BIF_RET(am_false);
+ code_ix = erts_active_code_ix();
+ modp = erts_get_module(BIF_ARG_1, code_ix);
+ if (modp != NULL) {
+ erts_rlock_old_code(code_ix);
+ if (modp->old.code != NULL) {
+ res = am_true;
+ }
+ erts_runlock_old_code(code_ix);
}
- BIF_RET(am_true);
+ BIF_RET(res);
}
Eterm
@@ -180,14 +407,20 @@ check_process_code_2(BIF_ALIST_2)
}
if (is_internal_pid(BIF_ARG_1)) {
Eterm res;
+ ErtsCodeIndex code_ix;
if (internal_pid_index(BIF_ARG_1) >= erts_max_processes)
goto error;
- modp = erts_get_module(BIF_ARG_2);
+ code_ix = erts_active_code_ix();
+ modp = erts_get_module(BIF_ARG_2, code_ix);
if (modp == NULL) { /* Doesn't exist. */
return am_false;
- } else if (modp->old_code == NULL) { /* No old code. */
+ }
+ erts_rlock_old_code(code_ix);
+ if (modp->old.code == NULL) { /* No old code. */
+ erts_runlock_old_code(code_ix);
return am_false;
}
+ erts_runlock_old_code(code_ix);
#ifdef ERTS_SMP
rp = erts_pid2proc_suspend(BIF_P, ERTS_PROC_LOCK_MAIN,
@@ -202,7 +435,14 @@ check_process_code_2(BIF_ALIST_2)
ERTS_BIF_YIELD2(bif_export[BIF_check_process_code_2], BIF_P,
BIF_ARG_1, BIF_ARG_2);
}
- res = check_process_code(rp, modp);
+ erts_rlock_old_code(code_ix);
+ if (modp->old.code != NULL) { /* must check again */
+ res = check_process_code(rp, modp);
+ }
+ else {
+ res = am_false;
+ }
+ erts_runlock_old_code(code_ix);
#ifdef ERTS_SMP
if (BIF_P != rp) {
erts_resume(rp, ERTS_PROC_LOCK_MAIN);
@@ -223,56 +463,71 @@ check_process_code_2(BIF_ALIST_2)
BIF_RETTYPE delete_module_1(BIF_ALIST_1)
{
- int res;
+ ErtsCodeIndex code_ix;
+ Module* modp;
+ int is_blocking = 0;
+ int success = 0;
+ Eterm res = NIL;
- if (is_not_atom(BIF_ARG_1))
- goto badarg;
+ if (is_not_atom(BIF_ARG_1)) {
+ BIF_ERROR(BIF_P, BADARG);
+ }
- erts_smp_proc_unlock(BIF_P, ERTS_PROC_LOCK_MAIN);
- erts_smp_thr_progress_block();
+ if (!erts_try_seize_code_write_permission(BIF_P)) {
+ ERTS_BIF_YIELD1(bif_export[BIF_delete_module_1], BIF_P, BIF_ARG_1);
+ }
{
- Module *modp = erts_get_module(BIF_ARG_1);
+ erts_start_staging_code_ix();
+ code_ix = erts_staging_code_ix();
+ modp = erts_get_module(BIF_ARG_1, code_ix);
if (!modp) {
res = am_undefined;
}
- else if (modp->old_code != 0) {
+ else if (modp->old.code != 0) {
erts_dsprintf_buf_t *dsbufp = erts_create_logger_dsbuf();
erts_dsprintf(dsbufp, "Module %T must be purged before loading\n",
BIF_ARG_1);
erts_send_error_to_logger(BIF_P->group_leader, dsbufp);
- res = am_badarg;
+ ERTS_BIF_PREP_ERROR(res, BIF_P, BADARG);
}
else {
- delete_export_references(BIF_ARG_1);
- delete_code(BIF_P, 0, modp);
+ if (modp->curr.num_breakpoints > 0 ||
+ modp->curr.num_traced_exports > 0) {
+ /* we have tracing, retry single threaded */
+ erts_smp_proc_unlock(BIF_P, ERTS_PROC_LOCK_MAIN);
+ erts_smp_thr_progress_block();
+ is_blocking = 1;
+ if (modp->curr.num_breakpoints) {
+ erts_clear_module_break(modp);
+ ASSERT(modp->curr.num_breakpoints == 0);
+ }
+ }
+ delete_code(modp);
res = am_true;
+ success = 1;
}
}
-
- erts_smp_thr_progress_unblock();
- erts_smp_proc_lock(BIF_P, ERTS_PROC_LOCK_MAIN);
-
- if (res == am_badarg) {
- badarg:
- BIF_ERROR(BIF_P, BADARG);
- }
- BIF_RET(res);
+ return staging_epilogue(BIF_P, success, res, is_blocking, NULL, 0);
}
BIF_RETTYPE module_loaded_1(BIF_ALIST_1)
{
Module* modp;
+ ErtsCodeIndex code_ix;
+ Eterm res = am_false;
if (is_not_atom(BIF_ARG_1)) {
BIF_ERROR(BIF_P, BADARG);
}
- if ((modp = erts_get_module(BIF_ARG_1)) == NULL ||
- modp->code == NULL ||
- modp->code[MI_ON_LOAD_FUNCTION_PTR] != 0) {
- BIF_RET(am_false);
+ code_ix = erts_active_code_ix();
+ if ((modp = erts_get_module(BIF_ARG_1, code_ix)) != NULL) {
+ if (modp->curr.code != NULL
+ && modp->curr.code[MI_ON_LOAD_FUNCTION_PTR] == 0) {
+ res = am_true;
+ }
}
- BIF_RET(am_true);
+ BIF_RET(res);
}
BIF_RETTYPE pre_loaded_0(BIF_ALIST_0)
@@ -282,27 +537,28 @@ BIF_RETTYPE pre_loaded_0(BIF_ALIST_0)
BIF_RETTYPE loaded_0(BIF_ALIST_0)
{
+ ErtsCodeIndex code_ix = erts_active_code_ix();
+ Module* modp;
Eterm previous = NIL;
Eterm* hp;
int i;
int j = 0;
-
- for (i = 0; i < module_code_size(); i++) {
- if (module_code(i) != NULL &&
- ((module_code(i)->code_length != 0) ||
- (module_code(i)->old_code_length != 0))) {
+
+ for (i = 0; i < module_code_size(code_ix); i++) {
+ if ((modp = module_code(i, code_ix)) != NULL &&
+ ((modp->curr.code_length != 0) ||
+ (modp->old.code_length != 0))) {
j++;
}
}
if (j > 0) {
hp = HAlloc(BIF_P, j*2);
- for (i = 0; i < module_code_size(); i++) {
- if (module_code(i) != NULL &&
- ((module_code(i)->code_length != 0) ||
- (module_code(i)->old_code_length != 0))) {
- previous = CONS(hp, make_atom(module_code(i)->module),
- previous);
+ for (i = 0; i < module_code_size(code_ix); i++) {
+ if ((modp=module_code(i,code_ix)) != NULL &&
+ ((modp->curr.code_length != 0) ||
+ (modp->old.code_length != 0))) {
+ previous = CONS(hp, make_atom(modp->module), previous);
hp += 2;
}
}
@@ -312,54 +568,65 @@ BIF_RETTYPE loaded_0(BIF_ALIST_0)
BIF_RETTYPE call_on_load_function_1(BIF_ALIST_1)
{
- Module* modp = erts_get_module(BIF_ARG_1);
- Eterm on_load;
+ Module* modp = erts_get_module(BIF_ARG_1, erts_active_code_ix());
- if (!modp || modp->code == 0) {
- error:
- BIF_ERROR(BIF_P, BADARG);
+ if (modp && modp->curr.code) {
+ BIF_TRAP_CODE_PTR_0(BIF_P, modp->curr.code[MI_ON_LOAD_FUNCTION_PTR]);
}
- if ((on_load = modp->code[MI_ON_LOAD_FUNCTION_PTR]) == 0) {
- goto error;
+ else {
+ BIF_ERROR(BIF_P, BADARG);
}
- BIF_TRAP_CODE_PTR_0(BIF_P, on_load);
}
BIF_RETTYPE finish_after_on_load_2(BIF_ALIST_2)
{
- Module* modp = erts_get_module(BIF_ARG_1);
+ ErtsCodeIndex code_ix;
+ Module* modp;
Eterm on_load;
- if (!modp || modp->code == 0) {
+ if (!erts_try_seize_code_write_permission(BIF_P)) {
+ ERTS_BIF_YIELD2(bif_export[BIF_finish_after_on_load_2],
+ BIF_P, BIF_ARG_1, BIF_ARG_2);
+ }
+
+ /* ToDo: Use code_ix staging instead of thread blocking */
+
+ erts_smp_proc_unlock(BIF_P, ERTS_PROC_LOCK_MAIN);
+ erts_smp_thr_progress_block();
+
+ code_ix = erts_active_code_ix();
+ modp = erts_get_module(BIF_ARG_1, code_ix);
+
+ if (!modp || modp->curr.code == 0) {
error:
+ erts_smp_thr_progress_unblock();
+ erts_smp_proc_lock(BIF_P, ERTS_PROC_LOCK_MAIN);
+ erts_release_code_write_permission();
BIF_ERROR(BIF_P, BADARG);
}
- if ((on_load = modp->code[MI_ON_LOAD_FUNCTION_PTR]) == 0) {
+ if ((on_load = modp->curr.code[MI_ON_LOAD_FUNCTION_PTR]) == 0) {
goto error;
}
if (BIF_ARG_2 != am_false && BIF_ARG_2 != am_true) {
goto error;
}
- erts_smp_proc_unlock(BIF_P, ERTS_PROC_LOCK_MAIN);
- erts_smp_thr_progress_block();
-
if (BIF_ARG_2 == am_true) {
int i;
/*
* The on_load function succeded. Fix up export entries.
*/
- for (i = 0; i < export_list_size(); i++) {
- Export *ep = export_list(i);
+ for (i = 0; i < export_list_size(code_ix); i++) {
+ Export *ep = export_list(i,code_ix);
if (ep != NULL &&
ep->code[0] == BIF_ARG_1 &&
ep->code[4] != 0) {
- ep->address = (void *) ep->code[4];
+ ep->addressv[code_ix] = (void *) ep->code[4];
ep->code[4] = 0;
}
}
- modp->code[MI_ON_LOAD_FUNCTION_PTR] = 0;
+ modp->curr.code[MI_ON_LOAD_FUNCTION_PTR] = 0;
set_default_trace_pattern(BIF_ARG_1);
} else if (BIF_ARG_2 == am_false) {
BeamInstr* code;
@@ -370,19 +637,21 @@ BIF_RETTYPE finish_after_on_load_2(BIF_ALIST_2)
* This is an combination of delete and purge. We purge
* the current code; the old code is not touched.
*/
- erts_total_code_size -= modp->code_length;
- code = modp->code;
- end = (BeamInstr *)((char *)code + modp->code_length);
+ erts_total_code_size -= modp->curr.code_length;
+ code = modp->curr.code;
+ end = (BeamInstr *)((char *)code + modp->curr.code_length);
erts_cleanup_funs_on_purge(code, end);
- beam_catches_delmod(modp->catches, code, modp->code_length);
+ beam_catches_delmod(modp->curr.catches, code, modp->curr.code_length,
+ erts_active_code_ix());
erts_free(ERTS_ALC_T_CODE, (void *) code);
- modp->code = NULL;
- modp->code_length = 0;
- modp->catches = BEAM_CATCHES_NIL;
- remove_from_address_table(code);
+ modp->curr.code = NULL;
+ modp->curr.code_length = 0;
+ modp->curr.catches = BEAM_CATCHES_NIL;
+ erts_remove_from_ranges(code);
}
erts_smp_thr_progress_unblock();
erts_smp_proc_lock(BIF_P, ERTS_PROC_LOCK_MAIN);
+ erts_release_code_write_permission();
BIF_RET(am_true);
}
@@ -429,10 +698,10 @@ check_process_code(Process* rp, Module* modp)
/*
* Pick up limits for the module.
*/
- start = modp->old_code;
- end = (BeamInstr *)((char *)start + modp->old_code_length);
+ start = modp->old.code;
+ end = (BeamInstr *)((char *)start + modp->old.code_length);
mod_start = (char *) start;
- mod_size = modp->old_code_length;
+ mod_size = modp->old.code_length;
/*
* Check if current instruction or continuation pointer points into module.
@@ -566,10 +835,10 @@ check_process_code(Process* rp, Module* modp)
done_gc = 1;
FLAGS(rp) |= F_NEED_FULLSWEEP;
(void) erts_garbage_collect(rp, 0, rp->arg_reg, rp->arity);
- literals = (Eterm *) modp->old_code[MI_LITERALS_START];
- lit_size = (Eterm *) modp->old_code[MI_LITERALS_END] - literals;
+ literals = (Eterm *) modp->old.code[MI_LITERALS_START];
+ lit_size = (Eterm *) modp->old.code[MI_LITERALS_END] - literals;
oh = (struct erl_off_heap_header *)
- modp->old_code[MI_LITERALS_OFF_HEAP];
+ modp->old.code[MI_LITERALS_OFF_HEAP];
erts_garbage_collect_literals(rp, literals, lit_size, oh);
}
}
@@ -628,53 +897,82 @@ any_heap_refs(Eterm* start, Eterm* end, char* mod_start, Uint mod_size)
#undef in_area
-
-static int
-purge_module(int module)
+BIF_RETTYPE purge_module_1(BIF_ALIST_1)
{
+ ErtsCodeIndex code_ix;
BeamInstr* code;
BeamInstr* end;
Module* modp;
+ int is_blocking = 0;
+ Eterm ret;
- /*
- * Correct module?
- */
-
- if ((modp = erts_get_module(make_atom(module))) == NULL) {
- return -2;
+ if (is_not_atom(BIF_ARG_1)) {
+ BIF_ERROR(BIF_P, BADARG);
}
- /*
- * Any code to purge?
- */
- if (modp->old_code == 0) {
- return -1;
+ if (!erts_try_seize_code_write_permission(BIF_P)) {
+ ERTS_BIF_YIELD1(bif_export[BIF_purge_module_1], BIF_P, BIF_ARG_1);
}
+ code_ix = erts_active_code_ix();
+
/*
- * Unload any NIF library
+ * Correct module?
*/
- if (modp->old_nif != NULL) {
- erts_unload_nif(modp->old_nif);
- modp->old_nif = NULL;
+
+ if ((modp = erts_get_module(BIF_ARG_1, code_ix)) == NULL) {
+ ERTS_BIF_PREP_ERROR(ret, BIF_P, BADARG);
}
+ else {
+ erts_rwlock_old_code(code_ix);
- /*
- * Remove the old code.
- */
- ASSERT(erts_total_code_size >= modp->old_code_length);
- erts_total_code_size -= modp->old_code_length;
- code = modp->old_code;
- end = (BeamInstr *)((char *)code + modp->old_code_length);
- erts_cleanup_funs_on_purge(code, end);
- beam_catches_delmod(modp->old_catches, code, modp->old_code_length);
- decrement_refc(code);
- erts_free(ERTS_ALC_T_CODE, (void *) code);
- modp->old_code = NULL;
- modp->old_code_length = 0;
- modp->old_catches = BEAM_CATCHES_NIL;
- remove_from_address_table(code);
- return 0;
+ /*
+ * Any code to purge?
+ */
+ if (modp->old.code == 0) {
+ ERTS_BIF_PREP_ERROR(ret, BIF_P, BADARG);
+ }
+ else {
+ /*
+ * Unload any NIF library
+ */
+ if (modp->old.nif != NULL) {
+ /* ToDo: Do unload nif without blocking */
+ erts_rwunlock_old_code(code_ix);
+ erts_smp_proc_unlock(BIF_P, ERTS_PROC_LOCK_MAIN);
+ erts_smp_thr_progress_block();
+ is_blocking = 1;
+ erts_rwlock_old_code(code_ix);
+ erts_unload_nif(modp->old.nif);
+ modp->old.nif = NULL;
+ }
+
+ /*
+ * Remove the old code.
+ */
+ ASSERT(erts_total_code_size >= modp->old.code_length);
+ erts_total_code_size -= modp->old.code_length;
+ code = modp->old.code;
+ end = (BeamInstr *)((char *)code + modp->old.code_length);
+ erts_cleanup_funs_on_purge(code, end);
+ beam_catches_delmod(modp->old.catches, code, modp->old.code_length,
+ code_ix);
+ decrement_refc(code);
+ erts_free(ERTS_ALC_T_CODE, (void *) code);
+ modp->old.code = NULL;
+ modp->old.code_length = 0;
+ modp->old.catches = BEAM_CATCHES_NIL;
+ erts_remove_from_ranges(code);
+ ERTS_BIF_PREP_RET(ret, am_true);
+ }
+ erts_rwunlock_old_code(code_ix);
+ }
+ if (is_blocking) {
+ erts_smp_thr_progress_unblock();
+ erts_smp_proc_lock(BIF_P, ERTS_PROC_LOCK_MAIN);
+ }
+ erts_release_code_write_permission();
+ return ret;
}
static void
@@ -694,92 +992,50 @@ decrement_refc(BeamInstr* code)
}
}
-static void
-remove_from_address_table(BeamInstr* code)
-{
- int i;
-
- for (i = 0; i < num_loaded_modules; i++) {
- if (modules[i].start == code) {
- num_loaded_modules--;
- while (i < num_loaded_modules) {
- modules[i] = modules[i+1];
- i++;
- }
- mid_module = &modules[num_loaded_modules/2];
- return;
- }
- }
- ASSERT(0); /* Not found? */
-}
-
-
/*
- * Move code from current to old.
+ * Move code from current to old and null all export entries for the module
*/
-static void
-delete_code(Process *c_p, ErtsProcLocks c_p_locks, Module* modp)
-{
-#ifdef ERTS_ENABLE_LOCK_CHECK
-#ifdef ERTS_SMP
- if (c_p && c_p_locks)
- erts_proc_lc_chk_only_proc_main(c_p);
- else
-#endif
- erts_lc_check_exact(NULL, 0);
-#endif
-
- /*
- * Clear breakpoints if any
- */
- if (modp->code != NULL && modp->code[MI_NUM_BREAKPOINTS] > 0) {
- if (c_p && c_p_locks)
- erts_smp_proc_unlock(c_p, ERTS_PROC_LOCK_MAIN);
- erts_smp_thr_progress_block();
- erts_clear_module_break(modp);
- modp->code[MI_NUM_BREAKPOINTS] = 0;
- erts_smp_thr_progress_unblock();
- if (c_p && c_p_locks)
- erts_smp_proc_lock(c_p, ERTS_PROC_LOCK_MAIN);
- }
- modp->old_code = modp->code;
- modp->old_code_length = modp->code_length;
- modp->old_catches = modp->catches;
- modp->old_nif = modp->nif;
- modp->code = NULL;
- modp->code_length = 0;
- modp->catches = BEAM_CATCHES_NIL;
- modp->nif = NULL;
-}
-
-
-/* null all references on the export table for the module called with the
- atom index below */
-
static void
-delete_export_references(Eterm module)
+delete_code(Module* modp)
{
+ ErtsCodeIndex code_ix = erts_staging_code_ix();
+ Eterm module = make_atom(modp->module);
int i;
- ASSERT(is_atom(module));
-
- for (i = 0; i < export_list_size(); i++) {
- Export *ep = export_list(i);
+ for (i = 0; i < export_list_size(code_ix); i++) {
+ Export *ep = export_list(i, code_ix);
if (ep != NULL && (ep->code[0] == module)) {
- if (ep->address == ep->code+3 &&
- (ep->code[3] == (BeamInstr) em_apply_bif)) {
- continue;
+ if (ep->addressv[code_ix] == ep->code+3) {
+ if (ep->code[3] == (BeamInstr) em_apply_bif) {
+ continue;
+ }
+ else if (ep->code[3] == (BeamInstr) em_call_traced_function) {
+ ERTS_SMP_LC_ASSERT(erts_smp_thr_progress_is_blocking());
+ ASSERT(modp->curr.num_traced_exports > 0);
+ --modp->curr.num_traced_exports;
+ MatchSetUnref(ep->match_prog_set);
+ ep->match_prog_set = NULL;
+ }
+ else ASSERT(ep->code[3] == (BeamInstr) em_call_error_handler
+ || !erts_initialized);
}
- ep->address = ep->code+3;
+ ep->addressv[code_ix] = ep->code+3;
ep->code[3] = (BeamInstr) em_call_error_handler;
ep->code[4] = 0;
- MatchSetUnref(ep->match_prog_set);
- ep->match_prog_set = NULL;
+ ASSERT(ep->match_prog_set == NULL);
}
}
+
+ ASSERT(modp->curr.num_breakpoints == 0);
+ ASSERT(modp->curr.num_traced_exports == 0);
+ modp->old = modp->curr;
+ modp->curr.code = NULL;
+ modp->curr.code_length = 0;
+ modp->curr.catches = BEAM_CATCHES_NIL;
+ modp->curr.nif = NULL;
}
-
+
Eterm
beam_make_current_old(Process *c_p, ErtsProcLocks c_p_locks, Eterm module)
@@ -791,11 +1047,10 @@ beam_make_current_old(Process *c_p, ErtsProcLocks c_p_locks, Eterm module)
* if not, delete old code; error if old code already exists.
*/
- if (modp->code != NULL && modp->old_code != NULL) {
+ if (modp->curr.code != NULL && modp->old.code != NULL) {
return am_not_purged;
- } else if (modp->old_code == NULL) { /* Make the current version old. */
- delete_code(c_p, c_p_locks, modp);
- delete_export_references(module);
+ } else if (modp->old.code == NULL) { /* Make the current version old. */
+ delete_code(modp);
}
return NIL;
}