GH-103082: Filter LINE events in VM, to simplify tool implementation. (GH-104387)

When monitoring LINE events, instrument all instructions that can have a predecessor on a different line.
Then check that the a new line has been hit in the instrumentation code.
This brings the behavior closer to that of 3.11, simplifying implementation and porting of tools.

1 files changed, 0 insertions, 22 deletions

diff --git a/Python/bytecodes.c b/Python/bytecodes.c
index eee9147..99935a3 100644
--- a/Python/bytecodes.c
+++ b/Python/bytecodes.c
@@ -3288,28 +3288,6 @@ dummy_func(
             assert(oparg >= 2);
         }
 
-        inst(INSTRUMENTED_LINE, ( -- )) {
-            _Py_CODEUNIT *here = next_instr-1;
-            _PyFrame_SetStackPointer(frame, stack_pointer);
-            int original_opcode = _Py_call_instrumentation_line(
-                    tstate, frame, here);
-            stack_pointer = _PyFrame_GetStackPointer(frame);
-            if (original_opcode < 0) {
-                next_instr = here+1;
-                goto error;
-            }
-            next_instr = frame->prev_instr;
-            if (next_instr != here) {
-                DISPATCH();
-            }
-            if (_PyOpcode_Caches[original_opcode]) {
-                _PyBinaryOpCache *cache = (_PyBinaryOpCache *)(next_instr+1);
-                INCREMENT_ADAPTIVE_COUNTER(cache->counter);
-            }
-            opcode = original_opcode;
-            DISPATCH_GOTO();
-        }
-
         inst(INSTRUMENTED_INSTRUCTION, ( -- )) {
             int next_opcode = _Py_call_instrumentation_instruction(
                 tstate, frame, next_instr-1);