Introduce a new trace_jump/1 instruction for tracing

As a preparation for introducing relative jumps, introduce
"trace_jump W" that can be used for tracing. This instruction
will continue to have an absolute address for the jump target.
(Note: This instruction is never created during loading; it
is only created in stubs when tracing is active.)

1 files changed, 13 insertions, 0 deletions

diff --git a/erts/emulator/beam/trace_instrs.tab b/erts/emulator/beam/trace_instrs.tab
index c71f2ef003..c28bc8ebcb 100644
--- a/erts/emulator/beam/trace_instrs.tab
+++ b/erts/emulator/beam/trace_instrs.tab
@@ -153,3 +153,16 @@ i_debug_breakpoint() {
     goto handle_error;
     //| -no_next
 }
+
+
+
+//
+// Special jump instruction used for tracing. Takes an absolute
+// failure address.
+//
+
+trace_jump(Fail) {
+    //| -no_next
+    SET_I((BeamInstr *) $Fail);
+    Goto(*I);
+}