Merge branch 'rickard/garbage_collect/OTP-11388'

* rickard/garbage_collect/OTP-11388:
  Parallel check_process_code when code_server purge a module
  Functionality for disabling garbage collection
  Use asynchronous check_process_code in code_parallel_SUITE
  Execution of system tasks in context of another process

Conflicts:
	bootstrap/lib/kernel/ebin/hipe_unified_loader.beam
	erts/preloaded/ebin/erlang.beam
	erts/preloaded/ebin/erts_internal.beam

1 files changed, 12 insertions, 1 deletions

diff --git a/erts/emulator/beam/erl_gc.c b/erts/emulator/beam/erl_gc.c
index e89725c190..c5585d39e8 100644
--- a/erts/emulator/beam/erl_gc.c
+++ b/erts/emulator/beam/erl_gc.c
@@ -400,10 +400,16 @@ erts_garbage_collect(Process* p, int need, Eterm* objv, int nobj)
     Uint reclaimed_now = 0;
     int done = 0;
     Uint ms1, s1, us1;
-    ErtsSchedulerData *esdp = erts_get_scheduler_data();
+    ErtsSchedulerData *esdp;
 #ifdef USE_VM_PROBES
     DTRACE_CHARBUF(pidbuf, DTRACE_TERM_BUF_SIZE);
 #endif
+
+    if (p->flags & F_DISABLE_GC)
+	return 1;
+
+    esdp = erts_get_scheduler_data();
+
     if (IS_TRACED_FL(p, F_TRACE_GC)) {
         trace_gc(p, am_gc_start);
     }
@@ -532,6 +538,9 @@ erts_garbage_collect_hibernate(Process* p)
     Uint area_size;
     Sint offs;
 
+    if (p->flags & F_DISABLE_GC)
+	ERTS_INTERNAL_ERROR("GC disabled");
+
     /*
      * Preliminaries.
      */
@@ -667,6 +676,8 @@ erts_garbage_collect_literals(Process* p, Eterm* literals,
     Uint n;
     struct erl_off_heap_header** prev;
 
+    if (p->flags & F_DISABLE_GC)
+	return;
     /*
      * Set GC state.
      */