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, 12 insertions, 0 deletions

diff --git a/erts/emulator/beam/erl_process.h b/erts/emulator/beam/erl_process.h
index d671638ce8..cff0783bc4 100644
--- a/erts/emulator/beam/erl_process.h
+++ b/erts/emulator/beam/erl_process.h
@@ -683,6 +683,10 @@ struct process {
     Uint seq_trace_lastcnt;
     Eterm seq_trace_token;	/* Sequential trace token (tuple size 5 see below) */
 
+#ifdef USE_VM_PROBES
+    Eterm dt_utag;              /* Place to store the dynamc trace user tag */
+    Uint dt_utag_flags;         /* flag field for the dt_utag */
+#endif       
     BeamInstr initial[3];	/* Initial module(0), function(1), arity(2), often used instead
 				   of pointer to funcinfo instruction, hence the BeamInstr datatype */
     BeamInstr* current;		/* Current Erlang function, part of the funcinfo:
@@ -998,6 +1002,14 @@ extern struct erts_system_profile_flags_t erts_system_profile_flags;
 #define SEQ_TRACE_PRINT    (1 << 2)
 #define SEQ_TRACE_TIMESTAMP (1 << 3)
 
+#ifdef USE_VM_PROBES
+#define DT_UTAG_PERMANENT (1 << 0)
+#define DT_UTAG_SPREADING (1 << 1)
+#define DT_UTAG(P) ((P)->dt_utag)
+#define DT_UTAG_FLAGS(P)  ((P)->dt_utag_flags) 
+#endif
+
+
 #ifdef ERTS_SMP
 /* Status flags ... */
 #define ERTS_PROC_SFLG_PENDADD2SCHEDQ	(((Uint32) 1) << 0)	/* Pending