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Copy pathexecutor.c
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147 lines (126 loc) · 4.21 KB
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#include "Python.h"
#include "opcode.h"
#include "pycore_bitutils.h"
#include "pycore_call.h"
#include "pycore_ceval.h"
#include "pycore_dict.h"
#include "pycore_emscripten_signal.h"
#include "pycore_intrinsics.h"
#include "pycore_long.h"
#include "pycore_object.h"
#include "pycore_opcode_metadata.h"
#include "pycore_opcode_utils.h"
#include "pycore_pyerrors.h"
#include "pycore_range.h"
#include "pycore_setobject.h" // _PySet_Update()
#include "pycore_sliceobject.h"
#include "pycore_uops.h"
#define TIER_TWO 2
#include "ceval_macros.h"
#undef DEOPT_IF
#define DEOPT_IF(COND, INSTNAME) \
if ((COND)) { \
goto deoptimize; \
}
#ifdef Py_STATS
// Disable these macros that apply to Tier 1 stats when we are in Tier 2
#undef STAT_INC
#define STAT_INC(opname, name) ((void)0)
#undef STAT_DEC
#define STAT_DEC(opname, name) ((void)0)
#undef CALL_STAT_INC
#define CALL_STAT_INC(name) ((void)0)
#endif
#undef ENABLE_SPECIALIZATION
#define ENABLE_SPECIALIZATION 0
_PyInterpreterFrame *
_PyUopExecute(_PyExecutorObject *executor, _PyInterpreterFrame *frame, PyObject **stack_pointer)
{
#ifdef Py_DEBUG
char *uop_debug = Py_GETENV("PYTHONUOPSDEBUG");
int lltrace = 0;
if (uop_debug != NULL && *uop_debug >= '0') {
lltrace = *uop_debug - '0'; // TODO: Parse an int and all that
}
#define DPRINTF(level, ...) \
if (lltrace >= (level)) { printf(__VA_ARGS__); }
#else
#define DPRINTF(level, ...)
#endif
DPRINTF(3,
"Entering _PyUopExecute for %s (%s:%d) at byte offset %ld\n",
PyUnicode_AsUTF8(_PyFrame_GetCode(frame)->co_qualname),
PyUnicode_AsUTF8(_PyFrame_GetCode(frame)->co_filename),
_PyFrame_GetCode(frame)->co_firstlineno,
2 * (long)(frame->prev_instr + 1 -
(_Py_CODEUNIT *)_PyFrame_GetCode(frame)->co_code_adaptive));
PyThreadState *tstate = _PyThreadState_GET();
_PyUOpExecutorObject *self = (_PyUOpExecutorObject *)executor;
CHECK_EVAL_BREAKER();
OPT_STAT_INC(traces_executed);
_Py_CODEUNIT *ip_offset = (_Py_CODEUNIT *)_PyFrame_GetCode(frame)->co_code_adaptive;
int pc = 0;
int opcode;
int oparg;
uint64_t operand;
#ifdef Py_STATS
uint64_t trace_uop_execution_counter = 0;
#endif
for (;;) {
opcode = self->trace[pc].opcode;
oparg = self->trace[pc].oparg;
operand = self->trace[pc].operand;
DPRINTF(3,
"%4d: uop %s, oparg %d, operand %" PRIu64 ", stack_level %d\n",
pc,
opcode < 256 ? _PyOpcode_OpName[opcode] : _PyOpcode_uop_name[opcode],
oparg,
operand,
(int)(stack_pointer - _PyFrame_Stackbase(frame)));
pc++;
OPT_STAT_INC(uops_executed);
UOP_EXE_INC(opcode);
#ifdef Py_STATS
trace_uop_execution_counter++;
#endif
switch (opcode) {
#include "executor_cases.c.h"
default:
{
fprintf(stderr, "Unknown uop %d, operand %" PRIu64 "\n", opcode, operand);
Py_FatalError("Unknown uop");
}
}
}
unbound_local_error:
_PyEval_FormatExcCheckArg(tstate, PyExc_UnboundLocalError,
UNBOUNDLOCAL_ERROR_MSG,
PyTuple_GetItem(_PyFrame_GetCode(frame)->co_localsplusnames, oparg)
);
goto error;
pop_4_error:
STACK_SHRINK(1);
pop_3_error:
STACK_SHRINK(1);
pop_2_error:
STACK_SHRINK(1);
pop_1_error:
STACK_SHRINK(1);
error:
// On ERROR_IF we return NULL as the frame.
// The caller recovers the frame from tstate->current_frame.
DPRINTF(2, "Error: [Opcode %d, operand %" PRIu64 "]\n", opcode, operand);
OPT_HIST(trace_uop_execution_counter, trace_run_length_hist);
_PyFrame_SetStackPointer(frame, stack_pointer);
Py_DECREF(self);
return NULL;
deoptimize:
// On DEOPT_IF we just repeat the last instruction.
// This presumes nothing was popped from the stack (nor pushed).
DPRINTF(2, "DEOPT: [Opcode %d, operand %" PRIu64 "]\n", opcode, operand);
OPT_HIST(trace_uop_execution_counter, trace_run_length_hist);
frame->prev_instr--; // Back up to just before destination
_PyFrame_SetStackPointer(frame, stack_pointer);
Py_DECREF(self);
return frame;
}