Merge branch 'pan/dtrace' into maint

* pan/dtrace: (22 commits)
  Use distinct function-entry probes for local and global calls
  Correct calculation of stack depth in call/return probes
  Add probes for all kind of calls
  Don't try to "clean up" generated fun names
  erl_process.c: Fix probe for process exit
  Remove code causing dialyzer warning from prim_file
  Add documentation for dyntrace and system_info changes
  Update slogan and add system_info for dynamic trace
  Update README's for dtrace and systemtap
  Rename dyntrace BIFs to more suiting names
  If VM probes are not enabled, short-circuit calls to probe BIFs
  beam_makeops: Add a simple preprocessor
  Ifdef all dynamic trace code
  Move dtrace erlang code and NIF into runtime_tools
  Correct some errors in the user tag spreading
  Change to more specific configure options for dtrace
  Add user tag spreading functionality to VM and use in file
  Update dtrace for changes in R15
  Add DTrace support for OS X, Solaris, and Linux (via SystemTap), 4/4
  Add DTrace support for OS X, Solaris, and Linux (via SystemTap), 3/4
  ...

OTP-10017

1 files changed, 89 insertions, 0 deletions

diff --git a/erts/emulator/beam/ops.tab b/erts/emulator/beam/ops.tab
index fc53a88a3a..b2fc571032 100644
--- a/erts/emulator/beam/ops.tab
+++ b/erts/emulator/beam/ops.tab
@@ -883,6 +883,95 @@ call_ext_last u==3 u$func:erlang:hibernate/3 D => i_hibernate
 call_ext_only u==3 u$func:erlang:hibernate/3 => i_hibernate
 
 #
+# If VM probes are not enabled, we want to short-circult calls to
+# the dt tag BIFs to make them as cheap as possible.
+#
+
+%unless USE_VM_PROBES
+
+call_ext Arity u$func:erlang:dt_get_tag/0 => \
+    move a=am_undefined r
+call_ext_last Arity u$func:erlang:dt_get_tag/0 D => \
+    move a=am_undefined r | deallocate D | return
+call_ext_only Arity u$func:erlang:dt_get_tag/0 => \
+    move a=am_undefined r | return
+
+move Any r | call_ext Arity u$func:erlang:dt_put_tag/1 => \
+    move a=am_undefined r
+move Any r | call_ext_last Arity u$func:erlang:dt_put_tag/1 D => \
+    move a=am_undefined r | deallocate D | return
+move Any r | call_ext_only Arity u$func:erlang:dt_put_tag/1 => \
+    move a=am_undefined r | return
+call_ext Arity u$func:erlang:dt_put_tag/1 => \
+    move a=am_undefined r
+call_ext_last Arity u$func:erlang:dt_put_tag/1 D => \
+    move a=am_undefined r | deallocate D | return
+call_ext_only Arity u$func:erlang:dt_put_tag/1 => \
+    move a=am_undefined r | return
+
+call_ext Arity u$func:erlang:dt_get_tag_data/0 => \
+    move a=am_undefined r
+call_ext_last Arity u$func:erlang:dt_get_tag_data/0 D => \
+    move a=am_undefined r | deallocate D | return
+call_ext_only Arity u$func:erlang:dt_get_tag_data/0 => \
+    move a=am_undefined r | return
+
+move Any r | call_ext Arity u$func:erlang:dt_spread_tag/1 => \
+    move a=am_true r
+move Any r | call_ext_last Arity u$func:erlang:dt_spread_tag/1 D => \
+    move a=am_true r | deallocate D | return
+move Any r | call_ext_only Arity u$func:erlang:dt_spread_tag/1 => \
+    move a=am_true r | return
+call_ext Arity u$func:erlang:dt_spread_tag/1 => \
+    move a=am_true r
+call_ext_last Arity u$func:erlang:dt_spread_tag/1 D => \
+    move a=am_true r | deallocate D | return
+call_ext_only Arity u$func:erlang:dt_spread_tag/1 => \
+    move a=am_true r | return
+
+move Any r | call_ext Arity u$func:erlang:dt_restore_tag/1 => \
+    move a=am_true r
+move Any r | call_ext_last Arity u$func:erlang:dt_restore_tag/1 D => \
+    move a=am_true r | deallocate D | return
+move Any r | call_ext_only Arity u$func:erlang:dt_restore_tag/1 => \
+    move a=am_true r | return
+call_ext Arity u$func:erlang:dt_restore_tag/1 => \
+    move a=am_true r
+call_ext_last Arity u$func:erlang:dt_restore_tag/1 D => \
+    move a=am_true r | deallocate D | return
+call_ext_only Arity u$func:erlang:dt_restore_tag/1 => \
+    move a=am_true r | return
+
+move Any r | call_ext Arity u$func:erlang:dt_prepend_vm_tag_data/1 => \
+    move Any r
+move Any r | call_ext_last Arity u$func:erlang:dt_prepend_vm_tag_data/1 D => \
+    move Any r | deallocate D | return
+move Any r | call_ext_only Arity u$func:erlang:dt_prepend_vm_tag_data/1 => \
+    move Any r | return
+call_ext Arity u$func:erlang:dt_prepend_vm_tag_data/1 =>
+call_ext_last Arity u$func:erlang:dt_prepend_vm_tag_data/1 D => \
+    deallocate D | return
+call_ext_only Arity u$func:erlang:dt_prepend_vm_tag_data/1 => \
+    return
+
+move Any r | call_ext Arity u$func:erlang:dt_append_vm_tag_data/1 => \
+    move Any r
+move Any r | call_ext_last Arity u$func:erlang:dt_append_vm_tag_data/1 D => \
+    move Any r | deallocate D | return
+move Any r | call_ext_only Arity u$func:erlang:dt_append_vm_tag_data/1 => \
+    move Any r | return
+call_ext Arity u$func:erlang:dt_append_vm_tag_data/1 =>
+call_ext_last Arity u$func:erlang:dt_append_vm_tag_data/1 D => \
+    deallocate D | return
+call_ext_only Arity u$func:erlang:dt_append_vm_tag_data/1 => \
+    return
+
+# Can happen after one of the transformations above.
+move Discarded r | move Something r => move Something r
+
+%endif
+
+#
 # The general case for BIFs that have no special instructions.
 # A BIF used in the tail must be followed by a return instruction.
 #