Add dirty_process_main function

Dirty schedulers only execute NIFs, so having them execute the full
process_main function isn't necessary. Add dirty_process_main for
dirty schedulers to execute instead.

Add erts_pre_dirty_nif(), called when preparing to execute a dirty
nif.

Add more dirty NIF tests to verify that activities requiring the
process main lock can succeed when the process is executing a dirty
NIF.

1 files changed, 20 insertions, 0 deletions

diff --git a/erts/emulator/test/dirty_nif_SUITE_data/dirty_nif_SUITE.c b/erts/emulator/test/dirty_nif_SUITE_data/dirty_nif_SUITE.c
index 2013c88167..1d2a099186 100644
--- a/erts/emulator/test/dirty_nif_SUITE_data/dirty_nif_SUITE.c
+++ b/erts/emulator/test/dirty_nif_SUITE_data/dirty_nif_SUITE.c
@@ -146,12 +146,31 @@ static ERL_NIF_TERM call_dirty_nif_zero_args(ErlNifEnv* env, int argc, const ERL
 static ERL_NIF_TERM
 dirty_sleeper(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[])
 {
+    ErlNifPid pid;
+    ErlNifEnv* msg_env = NULL;
+
     assert(enif_is_on_dirty_scheduler(env));
+
+    /* If we get a pid argument, it indicates a process involved in the
+       test wants a message from us. Prior to the sleep we send a 'ready'
+       message, and then after the sleep, send a 'done' message. */
+    if (argc == 1 && enif_get_local_pid(env, argv[0], &pid)) {
+        msg_env = enif_alloc_env();
+        enif_send(env, &pid, msg_env, enif_make_atom(msg_env, "ready"));
+    }
+
 #ifdef __WIN32__
     Sleep(6000);
 #else
     sleep(6);
 #endif
+
+    if (argc == 1) {
+        assert(msg_env != NULL);
+        enif_send(env, &pid, msg_env, enif_make_atom(msg_env, "done"));
+        enif_free_env(msg_env);
+    }
+
     return enif_make_atom(env, "ok");
 }
 
@@ -216,6 +235,7 @@ static ErlNifFunc nif_funcs[] =
     {"call_dirty_nif_exception", 1, call_dirty_nif_exception, ERL_NIF_DIRTY_JOB_IO_BOUND},
     {"call_dirty_nif_zero_args", 0, call_dirty_nif_zero_args, ERL_NIF_DIRTY_JOB_CPU_BOUND},
     {"dirty_sleeper", 0, dirty_sleeper, ERL_NIF_DIRTY_JOB_IO_BOUND},
+    {"dirty_sleeper", 1, dirty_sleeper, ERL_NIF_DIRTY_JOB_CPU_BOUND},
     {"dirty_call_while_terminated_nif", 1, dirty_call_while_terminated_nif, ERL_NIF_DIRTY_JOB_CPU_BOUND},
     {"dirty_heap_access_nif", 1, dirty_heap_access_nif, ERL_NIF_DIRTY_JOB_CPU_BOUND}
 };