Merge branch 'pan/otp_8332_halfword' into dev

* pan/otp_8332_halfword:
  Teach testcase in driver_suite the new prototype for driver_async
  wx: Correct usage of driver callbacks from wx thread
  Adopt the new (R13B04) Nif functionality to the halfword codebase
  Support monitoring and demonitoring from driver threads
  Fix further test-suite problems
  Correct the VM to work for more test suites
  Teach {wordsize,internal|external} to system_info/1
  Make tracing and distribution work
  Turn on instruction packing in the loader and virtual machine
  Add the BeamInstr data type for loaded BEAM code
  Fix the BEAM dissambler for the half-word emulator
  Store pointers to heap data in 32-bit words
  Add a custom mmap wrapper to force heaps into the lower address range
  Fit all heap data into the 32-bit address range

1 files changed, 22 insertions, 2 deletions

diff --git a/erts/emulator/test/system_info_SUITE.erl b/erts/emulator/test/system_info_SUITE.erl
index e782d2f293..ba433d4e11 100644
--- a/erts/emulator/test/system_info_SUITE.erl
+++ b/erts/emulator/test/system_info_SUITE.erl
@@ -35,12 +35,12 @@
 %-compile(export_all).
 -export([all/1, init_per_testcase/2, fin_per_testcase/2]).
 
--export([process_count/1, system_version/1, misc_smoke_tests/1, heap_size/1]).
+-export([process_count/1, system_version/1, misc_smoke_tests/1, heap_size/1, wordsize/1]).
 
 -define(DEFAULT_TIMEOUT, ?t:minutes(2)).
 
 all(doc) -> [];
-all(suite) -> [process_count, system_version, misc_smoke_tests, heap_size].
+all(suite) -> [process_count, system_version, misc_smoke_tests, heap_size, wordsize].
 
 init_per_testcase(_Case, Config) when is_list(Config) ->
     Dog = ?t:timetrap(?DEFAULT_TIMEOUT),
@@ -145,3 +145,23 @@ heap_size(Config) when is_list(Config) ->
    ?line Hmin  = proplists:get_value(min_heap_size, GCinf),
    ok.
 
+wordsize(suite) ->
+    [];
+wordsize(doc) ->
+    ["Tests the various wordsize variants"];
+wordsize(Config) when is_list(Config) ->
+    ?line A = erlang:system_info(wordsize),
+    ?line true = is_integer(A),
+    ?line A = erlang:system_info({wordsize,internal}),
+    ?line B = erlang:system_info({wordsize,external}),
+    ?line true = A =< B,
+    case {B,A} of
+	{4,4} ->
+	    {comment, "True 32-bit emulator"};
+	{8,8} ->
+	    {comment, "True 64-bit emulator"};
+	{8,4} ->
+	    {comment, "Halfword 64-bit emulator"};
+	Other ->
+	    exit({unexpected_wordsizes,Other})
+    end.