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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
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Mark Shannon 2023-04-12 12:04:55 +01:00 • committed by GitHub
parent dce2d38cb0
commit 411b169281
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44 changed files with 6029 additions and 1625 deletions
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9
Include/internal/pycore_frame.h
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@ -19,6 +19,7 @@ struct _frame {
struct _PyInterpreterFrame *f_frame; /* points to the frame data */
PyObject *f_trace; /* Trace function */
int f_lineno; /* Current line number. Only valid if non-zero */
int f_last_traced_line; /* The last line traced for this frame */
char f_trace_lines; /* Emit per-line trace events? */
char f_trace_opcodes; /* Emit per-opcode trace events? */
char f_fast_as_locals; /* Have the fast locals of this frame been converted to a dict? */
@ -137,10 +138,16 @@ _PyFrame_GetLocalsArray(_PyInterpreterFrame *frame)
return frame->localsplus;
}
/* Fetches the stack pointer, and sets stacktop to -1.
Having stacktop <= 0 ensures that invalid
values are not visible to the cycle GC.
We choose -1 rather than 0 to assist debugging. */
static inline PyObject**
_PyFrame_GetStackPointer(_PyInterpreterFrame *frame)
{
return frame->localsplus+frame->stacktop;
PyObject **sp = frame->localsplus + frame->stacktop;
frame->stacktop = -1;
return sp;
}
static inline void