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GH-103082: Implementation of PEP 669: Low Impact Monitoring for CPython (GH-103083)

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* The majority of the monitoring code is in instrumentation.c

* The new instrumentation bytecodes are in bytecodes.c

* legacy_tracing.c adapts the new API to the old sys.setrace and sys.setprofile APIs
This commit is contained in:
Mark Shannon 2023-04-12 12:04:55 +01:00 • committed by GitHub
parent dce2d38cb0
commit 411b169281
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GPG key ID: 4AEE18F83AFDEB23
44 changed files with 6029 additions and 1625 deletions
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61
Python/ceval_macros.h
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@ -93,8 +93,6 @@
{ \
NEXTOPARG(); \
PRE_DISPATCH_GOTO(); \
assert(cframe.use_tracing == 0 || cframe.use_tracing == 255); \
opcode |= cframe.use_tracing OR_DTRACE_LINE; \
DISPATCH_GOTO(); \
}
@ -102,7 +100,6 @@
{ \
opcode = next_instr->op.code; \
PRE_DISPATCH_GOTO(); \
opcode |= cframe.use_tracing OR_DTRACE_LINE; \
DISPATCH_GOTO(); \
}
@ -183,7 +180,7 @@ GETITEM(PyObject *v, Py_ssize_t i) {
#define PREDICT(next_op) \
do { \
_Py_CODEUNIT word = *next_instr; \
opcode = word.op.code | cframe.use_tracing OR_DTRACE_LINE; \
opcode = word.op.code; \
if (opcode == next_op) { \
oparg = word.op.arg; \
INSTRUCTION_START(next_op); \
@ -283,47 +280,6 @@ GETITEM(PyObject *v, Py_ssize_t i) {
#define BUILTINS() frame->f_builtins
#define LOCALS() frame->f_locals
/* Shared opcode macros */
#define TRACE_FUNCTION_EXIT() \
if (cframe.use_tracing) { \
if (trace_function_exit(tstate, frame, retval)) { \
Py_DECREF(retval); \
goto exit_unwind; \
} \
}
#define DTRACE_FUNCTION_EXIT() \
if (PyDTrace_FUNCTION_RETURN_ENABLED()) { \
dtrace_function_return(frame); \
}
#define TRACE_FUNCTION_UNWIND() \
if (cframe.use_tracing) { \
/* Since we are already unwinding, \
* we don't care if this raises */ \
trace_function_exit(tstate, frame, NULL); \
}
#define TRACE_FUNCTION_ENTRY() \
if (cframe.use_tracing) { \
_PyFrame_SetStackPointer(frame, stack_pointer); \
int err = trace_function_entry(tstate, frame); \
stack_pointer = _PyFrame_GetStackPointer(frame); \
frame->stacktop = -1; \
if (err) { \
goto error; \
} \
}
#define TRACE_FUNCTION_THROW_ENTRY() \
if (cframe.use_tracing) { \
assert(frame->stacktop >= 0); \
if (trace_function_entry(tstate, frame)) { \
goto exit_unwind; \
} \
}
#define DTRACE_FUNCTION_ENTRY() \
if (PyDTrace_FUNCTION_ENTRY_ENABLED()) { \
dtrace_function_entry(frame); \
@ -371,3 +327,18 @@ do { \
_Py_DECREF_NO_DEALLOC(right); \
} \
} while (0)
// If a trace function sets a new f_lineno and
// *then* raises, we use the destination when searching
// for an exception handler, displaying the traceback, and so on
#define INSTRUMENTED_JUMP(src, dest, event) \
do { \
_PyFrame_SetStackPointer(frame, stack_pointer); \
int err = _Py_call_instrumentation_jump(tstate, event, frame, src, dest); \
stack_pointer = _PyFrame_GetStackPointer(frame); \
if (err) { \
next_instr = (dest)+1; \
goto error; \
} \
next_instr = frame->prev_instr; \
} while (0);