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GH-96421: Insert shim frame on entry to interpreter (GH-96319)

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* Adds EXIT_INTERPRETER instruction to exit PyEval_EvalDefault()

* Simplifies RETURN_VALUE, YIELD_VALUE and RETURN_GENERATOR instructions as they no longer need to check for entry frames.
This commit is contained in:
Mark Shannon 2022-11-10 04:34:57 -08:00 committed by GitHub
parent dbf2faf579
commit 1e197e63e2
No known key found for this signature in database
GPG key ID: 4AEE18F83AFDEB23
24 changed files with 450 additions and 346 deletions
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10
Include/internal/pycore_code.h
View file

@ -456,6 +456,16 @@ _PyCode_LineNumberFromArray(PyCodeObject *co, int index)
}
}
typedef struct _PyShimCodeDef {
const uint8_t *code;
int codelen;
int stacksize;
const char *cname;
} _PyShimCodeDef;
extern PyCodeObject *
_Py_MakeShimCode(const _PyShimCodeDef *code);
#ifdef __cplusplus
}

17
Include/internal/pycore_frame.h
View file

@ -42,17 +42,18 @@ typedef enum _framestate {
enum _frameowner {
FRAME_OWNED_BY_THREAD = 0,
FRAME_OWNED_BY_GENERATOR = 1,
FRAME_OWNED_BY_FRAME_OBJECT = 2
FRAME_OWNED_BY_FRAME_OBJECT = 2,
FRAME_OWNED_BY_CSTACK = 3,
};
typedef struct _PyInterpreterFrame {
/* "Specials" section */
PyObject *f_funcobj; /* Strong reference */
PyObject *f_globals; /* Borrowed reference */
PyObject *f_builtins; /* Borrowed reference */
PyObject *f_locals; /* Strong reference, may be NULL */
PyObject *f_funcobj; /* Strong reference. Only valid if not on C stack */
PyObject *f_globals; /* Borrowed reference. Only valid if not on C stack */
PyObject *f_builtins; /* Borrowed reference. Only valid if not on C stack */
PyObject *f_locals; /* Strong reference, may be NULL. Only valid if not on C stack */
PyCodeObject *f_code; /* Strong reference */
PyFrameObject *frame_obj; /* Strong reference, may be NULL */
PyFrameObject *frame_obj; /* Strong reference, may be NULL. Only valid if not on C stack */
/* Linkage section */
struct _PyInterpreterFrame *previous;
// NOTE: This is not necessarily the last instruction started in the given
@ -60,9 +61,8 @@ typedef struct _PyInterpreterFrame {
// example, it may be an inline CACHE entry, an instruction we just jumped
// over, or (in the case of a newly-created frame) a totally invalid value:
_Py_CODEUNIT *prev_instr;
int stacktop; /* Offset of TOS from localsplus */
int stacktop; /* Offset of TOS from localsplus */
uint16_t yield_offset;
bool is_entry; // Whether this is the "root" frame for the current _PyCFrame.
char owner;
/* Locals and stack */
PyObject *localsplus[1];
@ -110,7 +110,6 @@ _PyFrame_InitializeSpecials(
frame->stacktop = code->co_nlocalsplus;
frame->frame_obj = NULL;
frame->prev_instr = _PyCode_CODE(code) - 1;
frame->is_entry = false;
frame->yield_offset = 0;
frame->owner = FRAME_OWNED_BY_THREAD;
}

1
Include/internal/pycore_global_objects_fini_generated.h generated
View file

@ -564,6 +564,7 @@ _PyStaticObjects_CheckRefcnt(void) {
_PyStaticObject_CheckRefcnt((PyObject *)&_Py_STR(newline));
_PyStaticObject_CheckRefcnt((PyObject *)&_Py_STR(open_br));
_PyStaticObject_CheckRefcnt((PyObject *)&_Py_STR(percent));
_PyStaticObject_CheckRefcnt((PyObject *)&_Py_STR(shim_name));
_PyStaticObject_CheckRefcnt((PyObject *)&_Py_STR(utf_8));
_PyStaticObject_CheckRefcnt((PyObject *)&_Py_ID(CANCELLED));
_PyStaticObject_CheckRefcnt((PyObject *)&_Py_ID(FINISHED));

1
Include/internal/pycore_global_strings.h
View file

@ -48,6 +48,7 @@ struct _Py_global_strings {
STRUCT_FOR_STR(newline, "\n")
STRUCT_FOR_STR(open_br, "{")
STRUCT_FOR_STR(percent, "%")
STRUCT_FOR_STR(shim_name, "<shim>")
STRUCT_FOR_STR(utf_8, "utf-8")
} literals;

1
Include/internal/pycore_interp.h
View file

@ -186,6 +186,7 @@ struct _is {
struct ast_state ast;
struct types_state types;
struct callable_cache callable_cache;
PyCodeObject *interpreter_trampoline;
/* The following fields are here to avoid allocation during init.
The data is exposed through PyInterpreterState pointer fields.

44
Include/internal/pycore_opcode.h generated
View file

@ -136,6 +136,7 @@ const uint8_t _PyOpcode_Deopt[256] = {
[IMPORT_FROM] = IMPORT_FROM,
[IMPORT_NAME] = IMPORT_NAME,
[IMPORT_STAR] = IMPORT_STAR,
[INTERPRETER_EXIT] = INTERPRETER_EXIT,
[IS_OP] = IS_OP,
[JUMP_BACKWARD] = JUMP_BACKWARD,
[JUMP_BACKWARD_NO_INTERRUPT] = JUMP_BACKWARD_NO_INTERRUPT,
@ -235,19 +236,20 @@ static const char *const _PyOpcode_OpName[263] = {
[CACHE] = "CACHE",
[POP_TOP] = "POP_TOP",
[PUSH_NULL] = "PUSH_NULL",
[BINARY_OP_ADD_FLOAT] = "BINARY_OP_ADD_FLOAT",
[INTERPRETER_EXIT] = "INTERPRETER_EXIT",
[END_FOR] = "END_FOR",
[BINARY_OP_ADD_FLOAT] = "BINARY_OP_ADD_FLOAT",
[BINARY_OP_ADD_INT] = "BINARY_OP_ADD_INT",
[BINARY_OP_ADD_UNICODE] = "BINARY_OP_ADD_UNICODE",
[BINARY_OP_GENERIC] = "BINARY_OP_GENERIC",
[BINARY_OP_INPLACE_ADD_UNICODE] = "BINARY_OP_INPLACE_ADD_UNICODE",
[NOP] = "NOP",
[UNARY_POSITIVE] = "UNARY_POSITIVE",
[UNARY_NEGATIVE] = "UNARY_NEGATIVE",
[UNARY_NOT] = "UNARY_NOT",
[BINARY_OP_INPLACE_ADD_UNICODE] = "BINARY_OP_INPLACE_ADD_UNICODE",
[BINARY_OP_MULTIPLY_FLOAT] = "BINARY_OP_MULTIPLY_FLOAT",
[BINARY_OP_MULTIPLY_INT] = "BINARY_OP_MULTIPLY_INT",
[UNARY_INVERT] = "UNARY_INVERT",
[BINARY_OP_MULTIPLY_INT] = "BINARY_OP_MULTIPLY_INT",
[BINARY_OP_SUBTRACT_FLOAT] = "BINARY_OP_SUBTRACT_FLOAT",
[BINARY_OP_SUBTRACT_INT] = "BINARY_OP_SUBTRACT_INT",
[BINARY_SUBSCR_DICT] = "BINARY_SUBSCR_DICT",
@ -256,20 +258,20 @@ static const char *const _PyOpcode_OpName[263] = {
[BINARY_SUBSCR_TUPLE_INT] = "BINARY_SUBSCR_TUPLE_INT",
[CALL_PY_EXACT_ARGS] = "CALL_PY_EXACT_ARGS",
[CALL_PY_WITH_DEFAULTS] = "CALL_PY_WITH_DEFAULTS",
[CALL_BOUND_METHOD_EXACT_ARGS] = "CALL_BOUND_METHOD_EXACT_ARGS",
[BINARY_SUBSCR] = "BINARY_SUBSCR",
[BINARY_SLICE] = "BINARY_SLICE",
[STORE_SLICE] = "STORE_SLICE",
[CALL_BOUND_METHOD_EXACT_ARGS] = "CALL_BOUND_METHOD_EXACT_ARGS",
[CALL_BUILTIN_CLASS] = "CALL_BUILTIN_CLASS",
[CALL_BUILTIN_FAST_WITH_KEYWORDS] = "CALL_BUILTIN_FAST_WITH_KEYWORDS",
[GET_LEN] = "GET_LEN",
[MATCH_MAPPING] = "MATCH_MAPPING",
[MATCH_SEQUENCE] = "MATCH_SEQUENCE",
[MATCH_KEYS] = "MATCH_KEYS",
[CALL_METHOD_DESCRIPTOR_FAST_WITH_KEYWORDS] = "CALL_METHOD_DESCRIPTOR_FAST_WITH_KEYWORDS",
[CALL_BUILTIN_FAST_WITH_KEYWORDS] = "CALL_BUILTIN_FAST_WITH_KEYWORDS",
[PUSH_EXC_INFO] = "PUSH_EXC_INFO",
[CHECK_EXC_MATCH] = "CHECK_EXC_MATCH",
[CHECK_EG_MATCH] = "CHECK_EG_MATCH",
[CALL_METHOD_DESCRIPTOR_FAST_WITH_KEYWORDS] = "CALL_METHOD_DESCRIPTOR_FAST_WITH_KEYWORDS",
[CALL_NO_KW_BUILTIN_FAST] = "CALL_NO_KW_BUILTIN_FAST",
[CALL_NO_KW_BUILTIN_O] = "CALL_NO_KW_BUILTIN_O",
[CALL_NO_KW_ISINSTANCE] = "CALL_NO_KW_ISINSTANCE",
@ -280,7 +282,6 @@ static const char *const _PyOpcode_OpName[263] = {
[CALL_NO_KW_METHOD_DESCRIPTOR_O] = "CALL_NO_KW_METHOD_DESCRIPTOR_O",
[CALL_NO_KW_STR_1] = "CALL_NO_KW_STR_1",
[CALL_NO_KW_TUPLE_1] = "CALL_NO_KW_TUPLE_1",
[CALL_NO_KW_TYPE_1] = "CALL_NO_KW_TYPE_1",
[WITH_EXCEPT_START] = "WITH_EXCEPT_START",
[GET_AITER] = "GET_AITER",
[GET_ANEXT] = "GET_ANEXT",
@ -288,37 +289,37 @@ static const char *const _PyOpcode_OpName[263] = {
[BEFORE_WITH] = "BEFORE_WITH",
[END_ASYNC_FOR] = "END_ASYNC_FOR",
[CLEANUP_THROW] = "CLEANUP_THROW",
[CALL_NO_KW_TYPE_1] = "CALL_NO_KW_TYPE_1",
[COMPARE_OP_FLOAT_JUMP] = "COMPARE_OP_FLOAT_JUMP",
[COMPARE_OP_GENERIC] = "COMPARE_OP_GENERIC",
[COMPARE_OP_INT_JUMP] = "COMPARE_OP_INT_JUMP",
[COMPARE_OP_STR_JUMP] = "COMPARE_OP_STR_JUMP",
[STORE_SUBSCR] = "STORE_SUBSCR",
[DELETE_SUBSCR] = "DELETE_SUBSCR",
[FOR_ITER_LIST] = "FOR_ITER_LIST",
[COMPARE_OP_STR_JUMP] = "COMPARE_OP_STR_JUMP",
[STOPITERATION_ERROR] = "STOPITERATION_ERROR",
[FOR_ITER_LIST] = "FOR_ITER_LIST",
[FOR_ITER_RANGE] = "FOR_ITER_RANGE",
[FOR_ITER_GEN] = "FOR_ITER_GEN",
[LOAD_ATTR_CLASS] = "LOAD_ATTR_CLASS",
[LOAD_ATTR_GETATTRIBUTE_OVERRIDDEN] = "LOAD_ATTR_GETATTRIBUTE_OVERRIDDEN",
[GET_ITER] = "GET_ITER",
[GET_YIELD_FROM_ITER] = "GET_YIELD_FROM_ITER",
[PRINT_EXPR] = "PRINT_EXPR",
[LOAD_BUILD_CLASS] = "LOAD_BUILD_CLASS",
[LOAD_ATTR_GETATTRIBUTE_OVERRIDDEN] = "LOAD_ATTR_GETATTRIBUTE_OVERRIDDEN",
[LOAD_ATTR_INSTANCE_VALUE] = "LOAD_ATTR_INSTANCE_VALUE",
[LOAD_ATTR_MODULE] = "LOAD_ATTR_MODULE",
[LOAD_ASSERTION_ERROR] = "LOAD_ASSERTION_ERROR",
[RETURN_GENERATOR] = "RETURN_GENERATOR",
[LOAD_ATTR_MODULE] = "LOAD_ATTR_MODULE",
[LOAD_ATTR_PROPERTY] = "LOAD_ATTR_PROPERTY",
[LOAD_ATTR_SLOT] = "LOAD_ATTR_SLOT",
[LOAD_ATTR_WITH_HINT] = "LOAD_ATTR_WITH_HINT",
[LOAD_ATTR_METHOD_LAZY_DICT] = "LOAD_ATTR_METHOD_LAZY_DICT",
[LOAD_ATTR_METHOD_NO_DICT] = "LOAD_ATTR_METHOD_NO_DICT",
[LOAD_ATTR_METHOD_WITH_DICT] = "LOAD_ATTR_METHOD_WITH_DICT",
[LIST_TO_TUPLE] = "LIST_TO_TUPLE",
[RETURN_VALUE] = "RETURN_VALUE",
[IMPORT_STAR] = "IMPORT_STAR",
[SETUP_ANNOTATIONS] = "SETUP_ANNOTATIONS",
[LOAD_ATTR_METHOD_WITH_VALUES] = "LOAD_ATTR_METHOD_WITH_VALUES",
[LOAD_ATTR_METHOD_WITH_DICT] = "LOAD_ATTR_METHOD_WITH_DICT",
[ASYNC_GEN_WRAP] = "ASYNC_GEN_WRAP",
[PREP_RERAISE_STAR] = "PREP_RERAISE_STAR",
[POP_EXCEPT] = "POP_EXCEPT",
@ -345,7 +346,7 @@ static const char *const _PyOpcode_OpName[263] = {
[JUMP_FORWARD] = "JUMP_FORWARD",
[JUMP_IF_FALSE_OR_POP] = "JUMP_IF_FALSE_OR_POP",
[JUMP_IF_TRUE_OR_POP] = "JUMP_IF_TRUE_OR_POP",
[LOAD_CONST__LOAD_FAST] = "LOAD_CONST__LOAD_FAST",
[LOAD_ATTR_METHOD_WITH_VALUES] = "LOAD_ATTR_METHOD_WITH_VALUES",
[POP_JUMP_IF_FALSE] = "POP_JUMP_IF_FALSE",
[POP_JUMP_IF_TRUE] = "POP_JUMP_IF_TRUE",
[LOAD_GLOBAL] = "LOAD_GLOBAL",
@ -353,7 +354,7 @@ static const char *const _PyOpcode_OpName[263] = {
[CONTAINS_OP] = "CONTAINS_OP",
[RERAISE] = "RERAISE",
[COPY] = "COPY",
[LOAD_FAST__LOAD_CONST] = "LOAD_FAST__LOAD_CONST",
[LOAD_CONST__LOAD_FAST] = "LOAD_CONST__LOAD_FAST",
[BINARY_OP] = "BINARY_OP",
[SEND] = "SEND",
[LOAD_FAST] = "LOAD_FAST",
@ -373,9 +374,9 @@ static const char *const _PyOpcode_OpName[263] = {
[STORE_DEREF] = "STORE_DEREF",
[DELETE_DEREF] = "DELETE_DEREF",
[JUMP_BACKWARD] = "JUMP_BACKWARD",
[LOAD_FAST__LOAD_FAST] = "LOAD_FAST__LOAD_FAST",
[LOAD_FAST__LOAD_CONST] = "LOAD_FAST__LOAD_CONST",
[CALL_FUNCTION_EX] = "CALL_FUNCTION_EX",
[LOAD_GLOBAL_BUILTIN] = "LOAD_GLOBAL_BUILTIN",
[LOAD_FAST__LOAD_FAST] = "LOAD_FAST__LOAD_FAST",
[EXTENDED_ARG] = "EXTENDED_ARG",
[LIST_APPEND] = "LIST_APPEND",
[SET_ADD] = "SET_ADD",
@ -385,27 +386,27 @@ static const char *const _PyOpcode_OpName[263] = {
[YIELD_VALUE] = "YIELD_VALUE",
[RESUME] = "RESUME",
[MATCH_CLASS] = "MATCH_CLASS",
[LOAD_GLOBAL_BUILTIN] = "LOAD_GLOBAL_BUILTIN",
[LOAD_GLOBAL_MODULE] = "LOAD_GLOBAL_MODULE",
[STORE_ATTR_INSTANCE_VALUE] = "STORE_ATTR_INSTANCE_VALUE",
[FORMAT_VALUE] = "FORMAT_VALUE",
[BUILD_CONST_KEY_MAP] = "BUILD_CONST_KEY_MAP",
[BUILD_STRING] = "BUILD_STRING",
[STORE_ATTR_INSTANCE_VALUE] = "STORE_ATTR_INSTANCE_VALUE",
[STORE_ATTR_SLOT] = "STORE_ATTR_SLOT",
[STORE_ATTR_WITH_HINT] = "STORE_ATTR_WITH_HINT",
[STORE_FAST__LOAD_FAST] = "STORE_FAST__LOAD_FAST",
[STORE_FAST__STORE_FAST] = "STORE_FAST__STORE_FAST",
[LIST_EXTEND] = "LIST_EXTEND",
[SET_UPDATE] = "SET_UPDATE",
[DICT_MERGE] = "DICT_MERGE",
[DICT_UPDATE] = "DICT_UPDATE",
[STORE_FAST__STORE_FAST] = "STORE_FAST__STORE_FAST",
[STORE_SUBSCR_DICT] = "STORE_SUBSCR_DICT",
[STORE_SUBSCR_LIST_INT] = "STORE_SUBSCR_LIST_INT",
[UNPACK_SEQUENCE_LIST] = "UNPACK_SEQUENCE_LIST",
[UNPACK_SEQUENCE_TUPLE] = "UNPACK_SEQUENCE_TUPLE",
[UNPACK_SEQUENCE_TWO_TUPLE] = "UNPACK_SEQUENCE_TWO_TUPLE",
[CALL] = "CALL",
[KW_NAMES] = "KW_NAMES",
[173] = "<173>",
[UNPACK_SEQUENCE_TWO_TUPLE] = "UNPACK_SEQUENCE_TWO_TUPLE",
[174] = "<174>",
[175] = "<175>",
[176] = "<176>",
@ -499,7 +500,6 @@ static const char *const _PyOpcode_OpName[263] = {
#endif
#define EXTRA_CASES \
case 173: \
case 174: \
case 175: \
case 176: \

1
Include/internal/pycore_runtime_init_generated.h generated
View file

@ -558,6 +558,7 @@ extern "C" {
INIT_STR(newline, "\n"), \
INIT_STR(open_br, "{"), \
INIT_STR(percent, "%"), \
INIT_STR(shim_name, "<shim>"), \
INIT_STR(utf_8, "utf-8"), \
}, \
.identifiers = { \

127
Include/opcode.h generated
View file

@ -11,6 +11,7 @@ extern "C" {
#define CACHE 0
#define POP_TOP 1
#define PUSH_NULL 2
#define INTERPRETER_EXIT 3
#define END_FOR 4
#define NOP 9
#define UNARY_POSITIVE 10
@ -128,69 +129,69 @@ extern "C" {
#define JUMP_NO_INTERRUPT 261
#define LOAD_METHOD 262
#define MAX_PSEUDO_OPCODE 262
#define BINARY_OP_ADD_FLOAT 3
#define BINARY_OP_ADD_INT 5
#define BINARY_OP_ADD_UNICODE 6
#define BINARY_OP_GENERIC 7
#define BINARY_OP_INPLACE_ADD_UNICODE 8
#define BINARY_OP_MULTIPLY_FLOAT 13
#define BINARY_OP_MULTIPLY_INT 14
#define BINARY_OP_SUBTRACT_FLOAT 16
#define BINARY_OP_SUBTRACT_INT 17
#define BINARY_SUBSCR_DICT 18
#define BINARY_SUBSCR_GETITEM 19
#define BINARY_SUBSCR_LIST_INT 20
#define BINARY_SUBSCR_TUPLE_INT 21
#define CALL_PY_EXACT_ARGS 22
#define CALL_PY_WITH_DEFAULTS 23
#define CALL_BOUND_METHOD_EXACT_ARGS 24
#define CALL_BUILTIN_CLASS 28
#define CALL_BUILTIN_FAST_WITH_KEYWORDS 29
#define CALL_METHOD_DESCRIPTOR_FAST_WITH_KEYWORDS 34
#define CALL_NO_KW_BUILTIN_FAST 38
#define CALL_NO_KW_BUILTIN_O 39
#define CALL_NO_KW_ISINSTANCE 40
#define CALL_NO_KW_LEN 41
#define CALL_NO_KW_LIST_APPEND 42
#define CALL_NO_KW_METHOD_DESCRIPTOR_FAST 43
#define CALL_NO_KW_METHOD_DESCRIPTOR_NOARGS 44
#define CALL_NO_KW_METHOD_DESCRIPTOR_O 45
#define CALL_NO_KW_STR_1 46
#define CALL_NO_KW_TUPLE_1 47
#define CALL_NO_KW_TYPE_1 48
#define COMPARE_OP_FLOAT_JUMP 56
#define COMPARE_OP_GENERIC 57
#define COMPARE_OP_INT_JUMP 58
#define COMPARE_OP_STR_JUMP 59
#define FOR_ITER_LIST 62
#define FOR_ITER_RANGE 64
#define FOR_ITER_GEN 65
#define LOAD_ATTR_CLASS 66
#define LOAD_ATTR_GETATTRIBUTE_OVERRIDDEN 67
#define LOAD_ATTR_INSTANCE_VALUE 72
#define LOAD_ATTR_MODULE 73
#define LOAD_ATTR_PROPERTY 76
#define LOAD_ATTR_SLOT 77
#define LOAD_ATTR_WITH_HINT 78
#define LOAD_ATTR_METHOD_LAZY_DICT 79
#define LOAD_ATTR_METHOD_NO_DICT 80
#define LOAD_ATTR_METHOD_WITH_DICT 81
#define LOAD_ATTR_METHOD_WITH_VALUES 86
#define LOAD_CONST__LOAD_FAST 113
#define LOAD_FAST__LOAD_CONST 121
#define LOAD_FAST__LOAD_FAST 141
#define LOAD_GLOBAL_BUILTIN 143
#define LOAD_GLOBAL_MODULE 153
#define STORE_ATTR_INSTANCE_VALUE 154
#define STORE_ATTR_SLOT 158
#define STORE_ATTR_WITH_HINT 159
#define STORE_FAST__LOAD_FAST 160
#define STORE_FAST__STORE_FAST 161
#define STORE_SUBSCR_DICT 166
#define STORE_SUBSCR_LIST_INT 167
#define UNPACK_SEQUENCE_LIST 168
#define UNPACK_SEQUENCE_TUPLE 169
#define UNPACK_SEQUENCE_TWO_TUPLE 170
#define BINARY_OP_ADD_FLOAT 5
#define BINARY_OP_ADD_INT 6
#define BINARY_OP_ADD_UNICODE 7
#define BINARY_OP_GENERIC 8
#define BINARY_OP_INPLACE_ADD_UNICODE 13
#define BINARY_OP_MULTIPLY_FLOAT 14
#define BINARY_OP_MULTIPLY_INT 16
#define BINARY_OP_SUBTRACT_FLOAT 17
#define BINARY_OP_SUBTRACT_INT 18
#define BINARY_SUBSCR_DICT 19
#define BINARY_SUBSCR_GETITEM 20
#define BINARY_SUBSCR_LIST_INT 21
#define BINARY_SUBSCR_TUPLE_INT 22
#define CALL_PY_EXACT_ARGS 23
#define CALL_PY_WITH_DEFAULTS 24
#define CALL_BOUND_METHOD_EXACT_ARGS 28
#define CALL_BUILTIN_CLASS 29
#define CALL_BUILTIN_FAST_WITH_KEYWORDS 34
#define CALL_METHOD_DESCRIPTOR_FAST_WITH_KEYWORDS 38
#define CALL_NO_KW_BUILTIN_FAST 39
#define CALL_NO_KW_BUILTIN_O 40
#define CALL_NO_KW_ISINSTANCE 41
#define CALL_NO_KW_LEN 42
#define CALL_NO_KW_LIST_APPEND 43
#define CALL_NO_KW_METHOD_DESCRIPTOR_FAST 44
#define CALL_NO_KW_METHOD_DESCRIPTOR_NOARGS 45
#define CALL_NO_KW_METHOD_DESCRIPTOR_O 46
#define CALL_NO_KW_STR_1 47
#define CALL_NO_KW_TUPLE_1 48
#define CALL_NO_KW_TYPE_1 56
#define COMPARE_OP_FLOAT_JUMP 57
#define COMPARE_OP_GENERIC 58
#define COMPARE_OP_INT_JUMP 59
#define COMPARE_OP_STR_JUMP 62
#define FOR_ITER_LIST 64
#define FOR_ITER_RANGE 65
#define FOR_ITER_GEN 66
#define LOAD_ATTR_CLASS 67
#define LOAD_ATTR_GETATTRIBUTE_OVERRIDDEN 72
#define LOAD_ATTR_INSTANCE_VALUE 73
#define LOAD_ATTR_MODULE 76
#define LOAD_ATTR_PROPERTY 77
#define LOAD_ATTR_SLOT 78
#define LOAD_ATTR_WITH_HINT 79
#define LOAD_ATTR_METHOD_LAZY_DICT 80
#define LOAD_ATTR_METHOD_NO_DICT 81
#define LOAD_ATTR_METHOD_WITH_DICT 86
#define LOAD_ATTR_METHOD_WITH_VALUES 113
#define LOAD_CONST__LOAD_FAST 121
#define LOAD_FAST__LOAD_CONST 141
#define LOAD_FAST__LOAD_FAST 143
#define LOAD_GLOBAL_BUILTIN 153
#define LOAD_GLOBAL_MODULE 154
#define STORE_ATTR_INSTANCE_VALUE 158
#define STORE_ATTR_SLOT 159
#define STORE_ATTR_WITH_HINT 160
#define STORE_FAST__LOAD_FAST 161
#define STORE_FAST__STORE_FAST 166
#define STORE_SUBSCR_DICT 167
#define STORE_SUBSCR_LIST_INT 168
#define UNPACK_SEQUENCE_LIST 169
#define UNPACK_SEQUENCE_TUPLE 170
#define UNPACK_SEQUENCE_TWO_TUPLE 173
#define DO_TRACING 255
#define HAS_ARG(op) ((((op) >= HAVE_ARGUMENT) && (!IS_PSEUDO_OPCODE(op)))\

1
Lib/opcode.py
View file

@ -77,6 +77,7 @@ def pseudo_op(name, op, real_ops):
def_op('CACHE', 0)
def_op('POP_TOP', 1)
def_op('PUSH_NULL', 2)
def_op('INTERPRETER_EXIT', 3)
def_op('END_FOR', 4)

13
Misc/NEWS.d/next/Core and Builtins/2022-10-19-15-59-08.gh-issue-96421.e22y3r.rst Normal file
View file

@ -0,0 +1,13 @@
When calling into Python code from C code, through :c:func:`PyEval_EvalFrameEx` or
a related C-API function, a shim frame in inserted into the call stack.
This occurs in the ``_PyEval_EvalFrameDefault()`` function.
The extra frame should be invisible to all Python and most C extensions,
but out-of-process profilers and debuggers need to be aware of it.
These shim frames can be detected by checking
``frame->owner == FRAME_OWNED_BY_CSTACK``.
Extensions implementing their own interpreters using PEP 523 need to be
aware of this shim frame and the changes to the semantics of
:opcode:`RETURN_VALUE`, :opcode:`YIELD_VALUE`, and :opcode:`RETURN_GENERATOR`,
which now clear the frame.

75
Objects/codeobject.c
View file

@ -2264,3 +2264,78 @@ _PyStaticCode_Init(PyCodeObject *co)
_PyCode_Quicken(co);
return 0;
}
#define MAX_CODE_UNITS_PER_LOC_ENTRY 8
PyCodeObject *
_Py_MakeShimCode(const _PyShimCodeDef *codedef)
{
PyObject *name = NULL;
PyObject *co_code = NULL;
PyObject *lines = NULL;
PyCodeObject *codeobj = NULL;
uint8_t *loc_table = NULL;
name = _PyUnicode_FromASCII(codedef->cname, strlen(codedef->cname));
if (name == NULL) {
goto cleanup;
}
co_code = PyBytes_FromStringAndSize(
(const char *)codedef->code, codedef->codelen);
if (co_code == NULL) {
goto cleanup;
}
int code_units = codedef->codelen / sizeof(_Py_CODEUNIT);
int loc_entries = (code_units + MAX_CODE_UNITS_PER_LOC_ENTRY - 1) /
MAX_CODE_UNITS_PER_LOC_ENTRY;
loc_table = PyMem_Malloc(loc_entries);
if (loc_table == NULL) {
PyErr_NoMemory();
goto cleanup;
}
for (int i = 0; i < loc_entries-1; i++) {
loc_table[i] = 0x80 | (PY_CODE_LOCATION_INFO_NONE << 3) | 7;
code_units -= MAX_CODE_UNITS_PER_LOC_ENTRY;
}
assert(loc_entries > 0);
assert(code_units > 0 && code_units <= MAX_CODE_UNITS_PER_LOC_ENTRY);
loc_table[loc_entries-1] = 0x80 |
(PY_CODE_LOCATION_INFO_NONE << 3) | (code_units-1);
lines = PyBytes_FromStringAndSize((const char *)loc_table, loc_entries);
PyMem_Free(loc_table);
if (lines == NULL) {
goto cleanup;
}
_Py_DECLARE_STR(shim_name, "<shim>");
struct _PyCodeConstructor con = {
.filename = &_Py_STR(shim_name),
.name = name,
.qualname = name,
.flags = CO_NEWLOCALS | CO_OPTIMIZED,
.code = co_code,
.firstlineno = 1,
.linetable = lines,
.consts = (PyObject *)&_Py_SINGLETON(tuple_empty),
.names = (PyObject *)&_Py_SINGLETON(tuple_empty),
.localsplusnames = (PyObject *)&_Py_SINGLETON(tuple_empty),
.localspluskinds = (PyObject *)&_Py_SINGLETON(bytes_empty),
.argcount = 0,
.posonlyargcount = 0,
.kwonlyargcount = 0,
.stacksize = codedef->stacksize,
.exceptiontable = (PyObject *)&_Py_SINGLETON(bytes_empty),
};
codeobj = _PyCode_New(&con);
cleanup:
Py_XDECREF(name);
Py_XDECREF(co_code);
Py_XDECREF(lines);
return codeobj;
}

22
Objects/frame_layout.md
View file

@ -9,10 +9,10 @@ # The Frame Stack
In 3.11, rather than have these frames scattered about memory,
as happens for heap-allocated objects, frames are allocated
contiguously in a per-thread stack.
contiguously in a per-thread stack.
This improves performance significantly for two reasons:
* It reduces allocation overhead to a pointer comparison and increment.
* Stack allocated data has the best possible locality and will always be in
* Stack allocated data has the best possible locality and will always be in
CPU cache.
Generator and coroutines still need heap allocated activation records, but
@ -63,7 +63,7 @@ #### Note:
> In a contiguous stack, we would need to save one fewer registers, as the
> top of the caller's activation record would be the same at the base of the
> callee's. However, since some activation records are kept on the heap we
> callee's. However, since some activation records are kept on the heap we
> cannot do this.
### Generators and Coroutines
@ -85,7 +85,7 @@ ### Generators and Coroutines
### Frame objects
When creating a backtrace or when calling `sys._getframe()` the frame becomes
visible to Python code. When this happens a new `PyFrameObject` is created
visible to Python code. When this happens a new `PyFrameObject` is created
and a strong reference to it placed in the `frame_obj` field of the specials
section. The `frame_obj` field is initially `NULL`.
@ -104,7 +104,7 @@ ### Generators and Coroutines
This means that creating a generator requires only a single allocation,
reducing allocation overhead and improving locality of reference.
The embedded frame is linked into the per-thread frame when iterated or
awaited.
awaited.
If a frame object associated with a generator outlives the generator, then
the embedded `_PyInterpreterFrame` is copied into the frame object.
@ -119,4 +119,14 @@ ### Field names
For example the `f_globals` field has a `f_` prefix implying it belongs to the
`PyFrameObject` struct, although it belongs to the `_PyInterpreterFrame` struct.
We may rationalize this naming scheme for 3.12.
We may rationalize this naming scheme for 3.12.
### Shim frames
On entry to `_PyEval_EvalFrameDefault()` a shim `_PyInterpreterFrame` is pushed.
This frame is stored on the C stack, and popped when `_PyEval_EvalFrameDefault()`
returns. This extra frame is inserted so that `RETURN_VALUE`, `YIELD_VALUE`, and
`RETURN_GENERATOR` do not need to check whether the current frame is the entry frame.
The shim frame points to a special code object containing the `INTERPRETER_EXIT`
instruction which cleans up the shim frame and returns.

10
Objects/frameobject.c
View file

@ -1329,15 +1329,15 @@ PyFrame_LocalsToFast(PyFrameObject *f, int clear)
}
}
int _PyFrame_IsEntryFrame(PyFrameObject *frame)
int
_PyFrame_IsEntryFrame(PyFrameObject *frame)
{
assert(frame != NULL);
assert(!_PyFrame_IsIncomplete(frame->f_frame));
return frame->f_frame->is_entry;
_PyInterpreterFrame *f = frame->f_frame;
assert(!_PyFrame_IsIncomplete(f));
return f->previous && f->previous->owner == FRAME_OWNED_BY_CSTACK;
}
PyCodeObject *
PyFrame_GetCode(PyFrameObject *frame)
{

15
Objects/genobject.c
View file

@ -207,8 +207,6 @@ gen_send_ex2(PyGenObject *gen, PyObject *arg, PyObject **presult,
Py_INCREF(result);
_PyFrame_StackPush(frame, result);
frame->previous = tstate->cframe->current_frame;
_PyErr_StackItem *prev_exc_info = tstate->exc_info;
gen->gi_exc_state.previous_item = prev_exc_info;
tstate->exc_info = &gen->gi_exc_state;
@ -223,14 +221,8 @@ gen_send_ex2(PyGenObject *gen, PyObject *arg, PyObject **presult,
result = _PyEval_EvalFrame(tstate, frame, exc);
assert(tstate->exc_info == prev_exc_info);
assert(gen->gi_exc_state.previous_item == NULL);
if (gen->gi_frame_state == FRAME_EXECUTING) {
gen->gi_frame_state = FRAME_COMPLETED;
}
assert(tstate->cframe->current_frame == frame->previous);
/* Don't keep the reference to previous any longer than necessary. It
* may keep a chain of frames alive or it could create a reference
* cycle. */
frame->previous = NULL;
assert(gen->gi_frame_state != FRAME_EXECUTING);
assert(frame->previous == NULL);
/* If the generator just returned (as opposed to yielding), signal
* that the generator is exhausted. */
@ -255,8 +247,7 @@ gen_send_ex2(PyGenObject *gen, PyObject *arg, PyObject **presult,
/* first clean reference cycle through stored exception traceback */
_PyErr_ClearExcState(&gen->gi_exc_state);
gen->gi_frame_state = FRAME_CLEARED;
_PyFrame_Clear(frame);
assert(gen->gi_frame_state == FRAME_CLEARED);
*presult = result;
return result ? PYGEN_RETURN : PYGEN_ERROR;
}

143
Python/bytecodes.c
View file

@ -97,8 +97,7 @@ dummy_func(
PyObject *consts,
_Py_CODEUNIT *next_instr,
PyObject **stack_pointer,
CallShape call_shape,
_Py_CODEUNIT *first_instr,
PyObject *kwnames,
int throwflag,
binaryfunc binary_ops[]
)
@ -617,6 +616,21 @@ dummy_func(
goto error;
}
// stack effect: (__0 -- )
inst(INTERPRETER_EXIT) {
assert(frame == &entry_frame);
assert(_PyFrame_IsIncomplete(frame));
PyObject *retval = POP();
assert(EMPTY());
/* Restore previous cframe and return. */
tstate->cframe = cframe.previous;
tstate->cframe->use_tracing = cframe.use_tracing;
assert(tstate->cframe->current_frame == frame->previous);
assert(!_PyErr_Occurred(tstate));
_Py_LeaveRecursiveCallTstate(tstate);
return retval;
}
// stack effect: (__0 -- )
inst(RETURN_VALUE) {
PyObject *retval = POP();
@ -625,23 +639,10 @@ dummy_func(
TRACE_FUNCTION_EXIT();
DTRACE_FUNCTION_EXIT();
_Py_LeaveRecursiveCallPy(tstate);
if (!frame->is_entry) {
frame = cframe.current_frame = pop_frame(tstate, frame);
_PyFrame_StackPush(frame, retval);
goto resume_frame;
}
_Py_LeaveRecursiveCallTstate(tstate);
if (frame->owner == FRAME_OWNED_BY_GENERATOR) {
PyGenObject *gen = _PyFrame_GetGenerator(frame);
tstate->exc_info = gen->gi_exc_state.previous_item;
gen->gi_exc_state.previous_item = NULL;
}
/* Restore previous cframe and return. */
tstate->cframe = cframe.previous;
tstate->cframe->use_tracing = cframe.use_tracing;
assert(tstate->cframe->current_frame == frame->previous);
assert(!_PyErr_Occurred(tstate));
return retval;
assert(frame != &entry_frame);
frame = cframe.current_frame = pop_frame(tstate, frame);
_PyFrame_StackPush(frame, retval);
goto resume_frame;
}
// stack effect: ( -- )
@ -775,6 +776,7 @@ dummy_func(
// error: SEND stack effect depends on jump flag
inst(SEND) {
assert(frame != &entry_frame);
assert(STACK_LEVEL() >= 2);
PyObject *v = POP();
PyObject *receiver = TOP();
@ -839,6 +841,7 @@ dummy_func(
// The compiler treats any exception raised here as a failed close()
// or throw() call.
assert(oparg == STACK_LEVEL());
assert(frame != &entry_frame);
PyObject *retval = POP();
PyGenObject *gen = _PyFrame_GetGenerator(frame);
gen->gi_frame_state = FRAME_SUSPENDED;
@ -848,19 +851,12 @@ dummy_func(
tstate->exc_info = gen->gi_exc_state.previous_item;
gen->gi_exc_state.previous_item = NULL;
_Py_LeaveRecursiveCallPy(tstate);
if (!frame->is_entry) {
frame = cframe.current_frame = frame->previous;
frame->prev_instr -= frame->yield_offset;
_PyFrame_StackPush(frame, retval);
goto resume_frame;
}
_Py_LeaveRecursiveCallTstate(tstate);
/* Restore previous cframe and return. */
tstate->cframe = cframe.previous;
tstate->cframe->use_tracing = cframe.use_tracing;
assert(tstate->cframe->current_frame == frame->previous);
assert(!_PyErr_Occurred(tstate));
return retval;
_PyInterpreterFrame *gen_frame = frame;
frame = cframe.current_frame = frame->previous;
gen_frame->previous = NULL;
frame->prev_instr -= frame->yield_offset;
_PyFrame_StackPush(frame, retval);
goto resume_frame;
}
// stack effect: (__0 -- )
@ -876,7 +872,7 @@ dummy_func(
if (oparg) {
PyObject *lasti = PEEK(oparg + 1);
if (PyLong_Check(lasti)) {
frame->prev_instr = first_instr + PyLong_AsLong(lasti);
frame->prev_instr = _PyCode_CODE(frame->f_code) + PyLong_AsLong(lasti);
assert(!_PyErr_Occurred(tstate));
}
else {
@ -2696,12 +2692,10 @@ dummy_func(
gen->gi_exc_state.previous_item = tstate->exc_info;
tstate->exc_info = &gen->gi_exc_state;
gen_frame->previous = frame;
gen_frame->is_entry = false;
frame = cframe.current_frame = gen_frame;
goto start_frame;
}
// stack effect: ( -- __0)
inst(BEFORE_ASYNC_WITH) {
PyObject *mgr = TOP();
@ -2929,9 +2923,9 @@ dummy_func(
// stack effect: ( -- )
inst(KW_NAMES) {
assert(call_shape.kwnames == NULL);
assert(kwnames == NULL);
assert(oparg < PyTuple_GET_SIZE(consts));
call_shape.kwnames = GETITEM(consts, oparg);
kwnames = GETITEM(consts, oparg);
}
// stack effect: (__0, __array[oparg] -- )
@ -2943,7 +2937,7 @@ dummy_func(
int nargs = oparg + is_meth;
PyObject *callable = PEEK(nargs + 1);
next_instr--;
_Py_Specialize_Call(callable, next_instr, nargs, call_shape.kwnames);
_Py_Specialize_Call(callable, next_instr, nargs, kwnames);
DISPATCH_SAME_OPARG();
}
STAT_INC(CALL, deferred);
@ -2972,9 +2966,9 @@ dummy_func(
STACK_SHRINK(total_args);
_PyInterpreterFrame *new_frame = _PyEvalFramePushAndInit(
tstate, (PyFunctionObject *)function, locals,
stack_pointer, positional_args, call_shape.kwnames
stack_pointer, positional_args, kwnames
);
call_shape.kwnames = NULL;
kwnames = NULL;
STACK_SHRINK(2-is_meth);
// The frame has stolen all the arguments from the stack,
// so there is no need to clean them up.
@ -2994,15 +2988,15 @@ dummy_func(
if (cframe.use_tracing) {
res = trace_call_function(
tstate, function, stack_pointer-total_args,
positional_args, call_shape.kwnames);
positional_args, kwnames);
}
else {
res = PyObject_Vectorcall(
function, stack_pointer-total_args,
positional_args | PY_VECTORCALL_ARGUMENTS_OFFSET,
call_shape.kwnames);
kwnames);
}
call_shape.kwnames = NULL;
kwnames = NULL;
assert((res != NULL) ^ (_PyErr_Occurred(tstate) != NULL));
Py_DECREF(function);
/* Clear the stack */
@ -3021,7 +3015,7 @@ dummy_func(
// stack effect: (__0, __array[oparg] -- )
inst(CALL_PY_EXACT_ARGS) {
assert(call_shape.kwnames == NULL);
assert(kwnames == NULL);
DEOPT_IF(tstate->interp->eval_frame, CALL);
_PyCallCache *cache = (_PyCallCache *)next_instr;
int is_meth = is_method(stack_pointer, oparg);
@ -3054,7 +3048,7 @@ dummy_func(
// stack effect: (__0, __array[oparg] -- )
inst(CALL_PY_WITH_DEFAULTS) {
assert(call_shape.kwnames == NULL);
assert(kwnames == NULL);
DEOPT_IF(tstate->interp->eval_frame, CALL);
_PyCallCache *cache = (_PyCallCache *)next_instr;
int is_meth = is_method(stack_pointer, oparg);
@ -3094,7 +3088,7 @@ dummy_func(
// stack effect: (__0, __array[oparg] -- )
inst(CALL_NO_KW_TYPE_1) {
assert(call_shape.kwnames == NULL);
assert(kwnames == NULL);
assert(cframe.use_tracing == 0);
assert(oparg == 1);
DEOPT_IF(is_method(stack_pointer, 1), CALL);
@ -3112,7 +3106,7 @@ dummy_func(
// stack effect: (__0, __array[oparg] -- )
inst(CALL_NO_KW_STR_1) {
assert(call_shape.kwnames == NULL);
assert(kwnames == NULL);
assert(cframe.use_tracing == 0);
assert(oparg == 1);
DEOPT_IF(is_method(stack_pointer, 1), CALL);
@ -3134,7 +3128,7 @@ dummy_func(
// stack effect: (__0, __array[oparg] -- )
inst(CALL_NO_KW_TUPLE_1) {
assert(call_shape.kwnames == NULL);
assert(kwnames == NULL);
assert(oparg == 1);
DEOPT_IF(is_method(stack_pointer, 1), CALL);
PyObject *callable = PEEK(2);
@ -3166,8 +3160,8 @@ dummy_func(
JUMPBY(INLINE_CACHE_ENTRIES_CALL);
STACK_SHRINK(total_args);
PyObject *res = tp->tp_vectorcall((PyObject *)tp, stack_pointer,
total_args-kwnames_len, call_shape.kwnames);
call_shape.kwnames = NULL;
total_args-kwnames_len, kwnames);
kwnames = NULL;
/* Free the arguments. */
for (int i = 0; i < total_args; i++) {
Py_DECREF(stack_pointer[i]);
@ -3185,7 +3179,7 @@ dummy_func(
inst(CALL_NO_KW_BUILTIN_O) {
assert(cframe.use_tracing == 0);
/* Builtin METH_O functions */
assert(call_shape.kwnames == NULL);
assert(kwnames == NULL);
int is_meth = is_method(stack_pointer, oparg);
int total_args = oparg + is_meth;
DEOPT_IF(total_args != 1, CALL);
@ -3219,7 +3213,7 @@ dummy_func(
inst(CALL_NO_KW_BUILTIN_FAST) {
assert(cframe.use_tracing == 0);
/* Builtin METH_FASTCALL functions, without keywords */
assert(call_shape.kwnames == NULL);
assert(kwnames == NULL);
int is_meth = is_method(stack_pointer, oparg);
int total_args = oparg + is_meth;
PyObject *callable = PEEK(total_args + 1);
@ -3276,10 +3270,10 @@ dummy_func(
PyCFunction_GET_SELF(callable),
stack_pointer,
total_args - KWNAMES_LEN(),
call_shape.kwnames
kwnames
);
assert((res != NULL) ^ (_PyErr_Occurred(tstate) != NULL));
call_shape.kwnames = NULL;
kwnames = NULL;
/* Free the arguments. */
for (int i = 0; i < total_args; i++) {
@ -3297,7 +3291,7 @@ dummy_func(
// stack effect: (__0, __array[oparg] -- )
inst(CALL_NO_KW_LEN) {
assert(cframe.use_tracing == 0);
assert(call_shape.kwnames == NULL);
assert(kwnames == NULL);
/* len(o) */
int is_meth = is_method(stack_pointer, oparg);
int total_args = oparg + is_meth;
@ -3327,7 +3321,7 @@ dummy_func(
// stack effect: (__0, __array[oparg] -- )
inst(CALL_NO_KW_ISINSTANCE) {
assert(cframe.use_tracing == 0);
assert(call_shape.kwnames == NULL);
assert(kwnames == NULL);
/* isinstance(o, o2) */
int is_meth = is_method(stack_pointer, oparg);
int total_args = oparg + is_meth;
@ -3360,7 +3354,7 @@ dummy_func(
// stack effect: (__0, __array[oparg] -- )
inst(CALL_NO_KW_LIST_APPEND) {
assert(cframe.use_tracing == 0);
assert(call_shape.kwnames == NULL);
assert(kwnames == NULL);
assert(oparg == 1);
PyObject *callable = PEEK(3);
PyInterpreterState *interp = _PyInterpreterState_GET();
@ -3382,7 +3376,7 @@ dummy_func(
// stack effect: (__0, __array[oparg] -- )
inst(CALL_NO_KW_METHOD_DESCRIPTOR_O) {
assert(call_shape.kwnames == NULL);
assert(kwnames == NULL);
int is_meth = is_method(stack_pointer, oparg);
int total_args = oparg + is_meth;
PyMethodDescrObject *callable =
@ -3435,9 +3429,9 @@ dummy_func(
_PyCFunctionFastWithKeywords cfunc =
(_PyCFunctionFastWithKeywords)(void(*)(void))meth->ml_meth;
PyObject *res = cfunc(self, stack_pointer, nargs - KWNAMES_LEN(),
call_shape.kwnames);
kwnames);
assert((res != NULL) ^ (_PyErr_Occurred(tstate) != NULL));
call_shape.kwnames = NULL;
kwnames = NULL;
/* Free the arguments. */
for (int i = 0; i < nargs; i++) {
@ -3455,7 +3449,7 @@ dummy_func(
// stack effect: (__0, __array[oparg] -- )
inst(CALL_NO_KW_METHOD_DESCRIPTOR_NOARGS) {
assert(call_shape.kwnames == NULL);
assert(kwnames == NULL);
assert(oparg == 0 || oparg == 1);
int is_meth = is_method(stack_pointer, oparg);
int total_args = oparg + is_meth;
@ -3489,7 +3483,7 @@ dummy_func(
// stack effect: (__0, __array[oparg] -- )
inst(CALL_NO_KW_METHOD_DESCRIPTOR_FAST) {
assert(call_shape.kwnames == NULL);
assert(kwnames == NULL);
int is_meth = is_method(stack_pointer, oparg);
int total_args = oparg + is_meth;
PyMethodDescrObject *callable =
@ -3606,25 +3600,12 @@ dummy_func(
gen->gi_frame_state = FRAME_CREATED;
gen_frame->owner = FRAME_OWNED_BY_GENERATOR;
_Py_LeaveRecursiveCallPy(tstate);
if (!frame->is_entry) {
_PyInterpreterFrame *prev = frame->previous;
_PyThreadState_PopFrame(tstate, frame);
frame = cframe.current_frame = prev;
_PyFrame_StackPush(frame, (PyObject *)gen);
goto resume_frame;
}
_Py_LeaveRecursiveCallTstate(tstate);
/* Make sure that frame is in a valid state */
frame->stacktop = 0;
frame->f_locals = NULL;
Py_INCREF(frame->f_funcobj);
Py_INCREF(frame->f_code);
/* Restore previous cframe and return. */
tstate->cframe = cframe.previous;
tstate->cframe->use_tracing = cframe.use_tracing;
assert(tstate->cframe->current_frame == frame->previous);
assert(!_PyErr_Occurred(tstate));
return (PyObject *)gen;
assert(frame != &entry_frame);
_PyInterpreterFrame *prev = frame->previous;
_PyThreadState_PopFrame(tstate, frame);
frame = cframe.current_frame = prev;
_PyFrame_StackPush(frame, (PyObject *)gen);
goto resume_frame;
}
// error: BUILD_SLICE has irregular stack effect

80
Python/ceval.c
View file

@ -155,7 +155,10 @@ static void
lltrace_resume_frame(_PyInterpreterFrame *frame)
{
PyObject *fobj = frame->f_funcobj;
if (fobj == NULL || !PyFunction_Check(fobj)) {
if (frame->owner == FRAME_OWNED_BY_CSTACK ||
fobj == NULL ||
!PyFunction_Check(fobj)
) {
printf("\nResuming frame.");
return;
}
@ -733,13 +736,13 @@ GETITEM(PyObject *v, Py_ssize_t i) {
/* Code access macros */
/* The integer overflow is checked by an assertion below. */
#define INSTR_OFFSET() ((int)(next_instr - first_instr))
#define INSTR_OFFSET() ((int)(next_instr - _PyCode_CODE(frame->f_code)))
#define NEXTOPARG() do { \
_Py_CODEUNIT word = *next_instr; \
opcode = _Py_OPCODE(word); \
oparg = _Py_OPARG(word); \
} while (0)
#define JUMPTO(x) (next_instr = first_instr + (x))
#define JUMPTO(x) (next_instr = _PyCode_CODE(frame->f_code) + (x))
#define JUMPBY(x) (next_instr += (x))
/* OpCode prediction macros
@ -1037,18 +1040,11 @@ static inline void _Py_LeaveRecursiveCallPy(PyThreadState *tstate) {
}
/* It is only between the KW_NAMES instruction and the following CALL,
* that this has any meaning.
*/
typedef struct {
PyObject *kwnames;
} CallShape;
// GH-89279: Must be a macro to be sure it's inlined by MSVC.
#define is_method(stack_pointer, args) (PEEK((args)+2) != NULL)
#define KWNAMES_LEN() \
(call_shape.kwnames == NULL ? 0 : ((int)PyTuple_GET_SIZE(call_shape.kwnames)))
(kwnames == NULL ? 0 : ((int)PyTuple_GET_SIZE(kwnames)))
PyObject* _Py_HOT_FUNCTION
_PyEval_EvalFrameDefault(PyThreadState *tstate, _PyInterpreterFrame *frame, int throwflag)
@ -1074,8 +1070,8 @@ _PyEval_EvalFrameDefault(PyThreadState *tstate, _PyInterpreterFrame *frame, int
#endif
_PyCFrame cframe;
CallShape call_shape;
call_shape.kwnames = NULL; // Borrowed reference. Reset by CALL instructions.
_PyInterpreterFrame entry_frame;
PyObject *kwnames = NULL; // Borrowed reference. Reset by CALL instructions.
/* WARNING: Because the _PyCFrame lives on the C stack,
* but can be accessed from a heap allocated object (tstate)
@ -1086,9 +1082,24 @@ _PyEval_EvalFrameDefault(PyThreadState *tstate, _PyInterpreterFrame *frame, int
cframe.previous = prev_cframe;
tstate->cframe = &cframe;
frame->is_entry = true;
assert(tstate->interp->interpreter_trampoline != NULL);
#ifdef Py_DEBUG
/* Set these to invalid but identifiable values for debugging. */
entry_frame.f_funcobj = (PyObject*)0xaaa0;
entry_frame.f_locals = (PyObject*)0xaaa1;
entry_frame.frame_obj = (PyFrameObject*)0xaaa2;
entry_frame.f_globals = (PyObject*)0xaaa3;
entry_frame.f_builtins = (PyObject*)0xaaa4;
#endif
entry_frame.f_code = tstate->interp->interpreter_trampoline;
entry_frame.prev_instr =
_PyCode_CODE(tstate->interp->interpreter_trampoline);
entry_frame.stacktop = 0;
entry_frame.owner = FRAME_OWNED_BY_CSTACK;
entry_frame.yield_offset = 0;
/* Push frame */
frame->previous = prev_cframe->current_frame;
entry_frame.previous = prev_cframe->current_frame;
frame->previous = &entry_frame;
cframe.current_frame = frame;
if (_Py_EnterRecursiveCallTstate(tstate, "")) {
@ -1112,7 +1123,6 @@ _PyEval_EvalFrameDefault(PyThreadState *tstate, _PyInterpreterFrame *frame, int
PyObject *names;
PyObject *consts;
_Py_CODEUNIT *first_instr;
_Py_CODEUNIT *next_instr;
PyObject **stack_pointer;
@ -1122,7 +1132,6 @@ _PyEval_EvalFrameDefault(PyThreadState *tstate, _PyInterpreterFrame *frame, int
PyCodeObject *co = frame->f_code; \
names = co->co_names; \
consts = co->co_consts; \
first_instr = _PyCode_CODE(co); \
} \
assert(_PyInterpreterFrame_LASTI(frame) >= -1); \
/* Jump back to the last instruction executed... */ \
@ -1147,14 +1156,16 @@ _PyEval_EvalFrameDefault(PyThreadState *tstate, _PyInterpreterFrame *frame, int
#ifdef LLTRACE
{
int r = PyDict_Contains(GLOBALS(), &_Py_ID(__lltrace__));
if (r < 0) {
goto exit_unwind;
if (frame != &entry_frame) {
int r = PyDict_Contains(GLOBALS(), &_Py_ID(__lltrace__));
if (r < 0) {
goto exit_unwind;
}
lltrace = r;
}
if (lltrace) {
lltrace_resume_frame(frame);
}
lltrace = r;
}
if (lltrace) {
lltrace_resume_frame(frame);
}
#endif
@ -1313,7 +1324,7 @@ _PyEval_EvalFrameDefault(PyThreadState *tstate, _PyInterpreterFrame *frame, int
pop_1_error:
STACK_SHRINK(1);
error:
call_shape.kwnames = NULL;
kwnames = NULL;
/* Double-check exception status. */
#ifdef NDEBUG
if (!_PyErr_Occurred(tstate)) {
@ -1325,6 +1336,7 @@ _PyEval_EvalFrameDefault(PyThreadState *tstate, _PyInterpreterFrame *frame, int
#endif
/* Log traceback info. */
assert(frame != &entry_frame);
if (!_PyFrame_IsIncomplete(frame)) {
PyFrameObject *f = _PyFrame_GetFrameObject(frame);
if (f != NULL) {
@ -1397,12 +1409,9 @@ _PyEval_EvalFrameDefault(PyThreadState *tstate, _PyInterpreterFrame *frame, int
exit_unwind:
assert(_PyErr_Occurred(tstate));
_Py_LeaveRecursiveCallPy(tstate);
if (frame->is_entry) {
if (frame->owner == FRAME_OWNED_BY_GENERATOR) {
PyGenObject *gen = _PyFrame_GetGenerator(frame);
tstate->exc_info = gen->gi_exc_state.previous_item;
gen->gi_exc_state.previous_item = NULL;
}
assert(frame != &entry_frame);
frame = cframe.current_frame = pop_frame(tstate, frame);
if (frame == &entry_frame) {
/* Restore previous cframe and exit */
tstate->cframe = cframe.previous;
tstate->cframe->use_tracing = cframe.use_tracing;
@ -1410,7 +1419,6 @@ _PyEval_EvalFrameDefault(PyThreadState *tstate, _PyInterpreterFrame *frame, int
_Py_LeaveRecursiveCallTstate(tstate);
return NULL;
}
frame = cframe.current_frame = pop_frame(tstate, frame);
resume_with_error:
SET_LOCALS_FROM_FRAME();
@ -2038,13 +2046,7 @@ _PyEval_Vector(PyThreadState *tstate, PyFunctionObject *func,
return NULL;
}
EVAL_CALL_STAT_INC(EVAL_CALL_VECTOR);
PyObject *retval = _PyEval_EvalFrame(tstate, frame, 0);
assert(
_PyFrame_GetStackPointer(frame) == _PyFrame_Stackbase(frame) ||
_PyFrame_GetStackPointer(frame) == frame->localsplus
);
_PyEvalFrameClearAndPop(tstate, frame);
return retval;
return _PyEval_EvalFrame(tstate, frame, 0);
}
/* Legacy API */

2
Python/compile.c
View file

@ -1256,6 +1256,8 @@ stack_effect(int opcode, int oparg, int jump)
return 1;
case BINARY_OP:
return -1;
case INTERPRETER_EXIT:
return -1;
default:
return PY_INVALID_STACK_EFFECT;
}

4
Python/frame.c
View file

@ -80,6 +80,7 @@ _PyFrame_Copy(_PyInterpreterFrame *src, _PyInterpreterFrame *dest)
static void
take_ownership(PyFrameObject *f, _PyInterpreterFrame *frame)
{
assert(frame->owner != FRAME_OWNED_BY_CSTACK);
assert(frame->owner != FRAME_OWNED_BY_FRAME_OBJECT);
assert(frame->owner != FRAME_CLEARED);
Py_ssize_t size = ((char*)&frame->localsplus[frame->stacktop]) - (char *)frame;
@ -99,7 +100,9 @@ take_ownership(PyFrameObject *f, _PyInterpreterFrame *frame)
while (prev && _PyFrame_IsIncomplete(prev)) {
prev = prev->previous;
}
frame->previous = NULL;
if (prev) {
assert(prev->owner != FRAME_OWNED_BY_CSTACK);
/* Link PyFrameObjects.f_back and remove link through _PyInterpreterFrame.previous */
PyFrameObject *back = _PyFrame_GetFrameObject(prev);
if (back == NULL) {
@ -111,7 +114,6 @@ take_ownership(PyFrameObject *f, _PyInterpreterFrame *frame)
else {
f->f_back = (PyFrameObject *)Py_NewRef(back);
}
frame->previous = NULL;
}
if (!_PyObject_GC_IS_TRACKED((PyObject *)f)) {
_PyObject_GC_TRACK((PyObject *)f);

138
Python/generated_cases.c.h generated
View file

@ -611,6 +611,20 @@
goto error;
}
TARGET(INTERPRETER_EXIT) {
assert(frame == &entry_frame);
assert(_PyFrame_IsIncomplete(frame));
PyObject *retval = POP();
assert(EMPTY());
/* Restore previous cframe and return. */
tstate->cframe = cframe.previous;
tstate->cframe->use_tracing = cframe.use_tracing;
assert(tstate->cframe->current_frame == frame->previous);
assert(!_PyErr_Occurred(tstate));
_Py_LeaveRecursiveCallTstate(tstate);
return retval;
}
TARGET(RETURN_VALUE) {
PyObject *retval = POP();
assert(EMPTY());
@ -618,23 +632,10 @@
TRACE_FUNCTION_EXIT();
DTRACE_FUNCTION_EXIT();
_Py_LeaveRecursiveCallPy(tstate);
if (!frame->is_entry) {
frame = cframe.current_frame = pop_frame(tstate, frame);
_PyFrame_StackPush(frame, retval);
goto resume_frame;
}
_Py_LeaveRecursiveCallTstate(tstate);
if (frame->owner == FRAME_OWNED_BY_GENERATOR) {
PyGenObject *gen = _PyFrame_GetGenerator(frame);
tstate->exc_info = gen->gi_exc_state.previous_item;
gen->gi_exc_state.previous_item = NULL;
}
/* Restore previous cframe and return. */
tstate->cframe = cframe.previous;
tstate->cframe->use_tracing = cframe.use_tracing;
assert(tstate->cframe->current_frame == frame->previous);
assert(!_PyErr_Occurred(tstate));
return retval;
assert(frame != &entry_frame);
frame = cframe.current_frame = pop_frame(tstate, frame);
_PyFrame_StackPush(frame, retval);
goto resume_frame;
}
TARGET(GET_AITER) {
@ -768,6 +769,7 @@
}
TARGET(SEND) {
assert(frame != &entry_frame);
assert(STACK_LEVEL() >= 2);
PyObject *v = POP();
PyObject *receiver = TOP();
@ -832,6 +834,7 @@
// The compiler treats any exception raised here as a failed close()
// or throw() call.
assert(oparg == STACK_LEVEL());
assert(frame != &entry_frame);
PyObject *retval = POP();
PyGenObject *gen = _PyFrame_GetGenerator(frame);
gen->gi_frame_state = FRAME_SUSPENDED;
@ -841,19 +844,12 @@
tstate->exc_info = gen->gi_exc_state.previous_item;
gen->gi_exc_state.previous_item = NULL;
_Py_LeaveRecursiveCallPy(tstate);
if (!frame->is_entry) {
frame = cframe.current_frame = frame->previous;
frame->prev_instr -= frame->yield_offset;
_PyFrame_StackPush(frame, retval);
goto resume_frame;
}
_Py_LeaveRecursiveCallTstate(tstate);
/* Restore previous cframe and return. */
tstate->cframe = cframe.previous;
tstate->cframe->use_tracing = cframe.use_tracing;
assert(tstate->cframe->current_frame == frame->previous);
assert(!_PyErr_Occurred(tstate));
return retval;
_PyInterpreterFrame *gen_frame = frame;
frame = cframe.current_frame = frame->previous;
gen_frame->previous = NULL;
frame->prev_instr -= frame->yield_offset;
_PyFrame_StackPush(frame, retval);
goto resume_frame;
}
TARGET(POP_EXCEPT) {
@ -868,7 +864,7 @@
if (oparg) {
PyObject *lasti = PEEK(oparg + 1);
if (PyLong_Check(lasti)) {
frame->prev_instr = first_instr + PyLong_AsLong(lasti);
frame->prev_instr = _PyCode_CODE(frame->f_code) + PyLong_AsLong(lasti);
assert(!_PyErr_Occurred(tstate));
}
else {
@ -2690,7 +2686,6 @@
gen->gi_exc_state.previous_item = tstate->exc_info;
tstate->exc_info = &gen->gi_exc_state;
gen_frame->previous = frame;
gen_frame->is_entry = false;
frame = cframe.current_frame = gen_frame;
goto start_frame;
}
@ -2919,9 +2914,9 @@
}
TARGET(KW_NAMES) {
assert(call_shape.kwnames == NULL);
assert(kwnames == NULL);
assert(oparg < PyTuple_GET_SIZE(consts));
call_shape.kwnames = GETITEM(consts, oparg);
kwnames = GETITEM(consts, oparg);
DISPATCH();
}
@ -2934,7 +2929,7 @@
int nargs = oparg + is_meth;
PyObject *callable = PEEK(nargs + 1);
next_instr--;
_Py_Specialize_Call(callable, next_instr, nargs, call_shape.kwnames);
_Py_Specialize_Call(callable, next_instr, nargs, kwnames);
DISPATCH_SAME_OPARG();
}
STAT_INC(CALL, deferred);
@ -2963,9 +2958,9 @@
STACK_SHRINK(total_args);
_PyInterpreterFrame *new_frame = _PyEvalFramePushAndInit(
tstate, (PyFunctionObject *)function, locals,
stack_pointer, positional_args, call_shape.kwnames
stack_pointer, positional_args, kwnames
);
call_shape.kwnames = NULL;
kwnames = NULL;
STACK_SHRINK(2-is_meth);
// The frame has stolen all the arguments from the stack,
// so there is no need to clean them up.
@ -2985,15 +2980,15 @@
if (cframe.use_tracing) {
res = trace_call_function(
tstate, function, stack_pointer-total_args,
positional_args, call_shape.kwnames);
positional_args, kwnames);
}
else {
res = PyObject_Vectorcall(
function, stack_pointer-total_args,
positional_args | PY_VECTORCALL_ARGUMENTS_OFFSET,
call_shape.kwnames);
kwnames);
}
call_shape.kwnames = NULL;
kwnames = NULL;
assert((res != NULL) ^ (_PyErr_Occurred(tstate) != NULL));
Py_DECREF(function);
/* Clear the stack */
@ -3013,7 +3008,7 @@
TARGET(CALL_PY_EXACT_ARGS) {
PREDICTED(CALL_PY_EXACT_ARGS);
assert(call_shape.kwnames == NULL);
assert(kwnames == NULL);
DEOPT_IF(tstate->interp->eval_frame, CALL);
_PyCallCache *cache = (_PyCallCache *)next_instr;
int is_meth = is_method(stack_pointer, oparg);
@ -3045,7 +3040,7 @@
}
TARGET(CALL_PY_WITH_DEFAULTS) {
assert(call_shape.kwnames == NULL);
assert(kwnames == NULL);
DEOPT_IF(tstate->interp->eval_frame, CALL);
_PyCallCache *cache = (_PyCallCache *)next_instr;
int is_meth = is_method(stack_pointer, oparg);
@ -3084,7 +3079,7 @@
}
TARGET(CALL_NO_KW_TYPE_1) {
assert(call_shape.kwnames == NULL);
assert(kwnames == NULL);
assert(cframe.use_tracing == 0);
assert(oparg == 1);
DEOPT_IF(is_method(stack_pointer, 1), CALL);
@ -3102,7 +3097,7 @@
}
TARGET(CALL_NO_KW_STR_1) {
assert(call_shape.kwnames == NULL);
assert(kwnames == NULL);
assert(cframe.use_tracing == 0);
assert(oparg == 1);
DEOPT_IF(is_method(stack_pointer, 1), CALL);
@ -3124,7 +3119,7 @@
}
TARGET(CALL_NO_KW_TUPLE_1) {
assert(call_shape.kwnames == NULL);
assert(kwnames == NULL);
assert(oparg == 1);
DEOPT_IF(is_method(stack_pointer, 1), CALL);
PyObject *callable = PEEK(2);
@ -3156,8 +3151,8 @@
JUMPBY(INLINE_CACHE_ENTRIES_CALL);
STACK_SHRINK(total_args);
PyObject *res = tp->tp_vectorcall((PyObject *)tp, stack_pointer,
total_args-kwnames_len, call_shape.kwnames);
call_shape.kwnames = NULL;
total_args-kwnames_len, kwnames);
kwnames = NULL;
/* Free the arguments. */
for (int i = 0; i < total_args; i++) {
Py_DECREF(stack_pointer[i]);
@ -3175,7 +3170,7 @@
TARGET(CALL_NO_KW_BUILTIN_O) {
assert(cframe.use_tracing == 0);
/* Builtin METH_O functions */
assert(call_shape.kwnames == NULL);
assert(kwnames == NULL);
int is_meth = is_method(stack_pointer, oparg);
int total_args = oparg + is_meth;
DEOPT_IF(total_args != 1, CALL);
@ -3209,7 +3204,7 @@
TARGET(CALL_NO_KW_BUILTIN_FAST) {
assert(cframe.use_tracing == 0);
/* Builtin METH_FASTCALL functions, without keywords */
assert(call_shape.kwnames == NULL);
assert(kwnames == NULL);
int is_meth = is_method(stack_pointer, oparg);
int total_args = oparg + is_meth;
PyObject *callable = PEEK(total_args + 1);
@ -3266,10 +3261,10 @@
PyCFunction_GET_SELF(callable),
stack_pointer,
total_args - KWNAMES_LEN(),
call_shape.kwnames
kwnames
);
assert((res != NULL) ^ (_PyErr_Occurred(tstate) != NULL));
call_shape.kwnames = NULL;
kwnames = NULL;
/* Free the arguments. */
for (int i = 0; i < total_args; i++) {
@ -3287,7 +3282,7 @@
TARGET(CALL_NO_KW_LEN) {
assert(cframe.use_tracing == 0);
assert(call_shape.kwnames == NULL);
assert(kwnames == NULL);
/* len(o) */
int is_meth = is_method(stack_pointer, oparg);
int total_args = oparg + is_meth;
@ -3317,7 +3312,7 @@
TARGET(CALL_NO_KW_ISINSTANCE) {
assert(cframe.use_tracing == 0);
assert(call_shape.kwnames == NULL);
assert(kwnames == NULL);
/* isinstance(o, o2) */
int is_meth = is_method(stack_pointer, oparg);
int total_args = oparg + is_meth;
@ -3350,7 +3345,7 @@
TARGET(CALL_NO_KW_LIST_APPEND) {
assert(cframe.use_tracing == 0);
assert(call_shape.kwnames == NULL);
assert(kwnames == NULL);
assert(oparg == 1);
PyObject *callable = PEEK(3);
PyInterpreterState *interp = _PyInterpreterState_GET();
@ -3372,7 +3367,7 @@
}
TARGET(CALL_NO_KW_METHOD_DESCRIPTOR_O) {
assert(call_shape.kwnames == NULL);
assert(kwnames == NULL);
int is_meth = is_method(stack_pointer, oparg);
int total_args = oparg + is_meth;
PyMethodDescrObject *callable =
@ -3425,9 +3420,9 @@
_PyCFunctionFastWithKeywords cfunc =
(_PyCFunctionFastWithKeywords)(void(*)(void))meth->ml_meth;
PyObject *res = cfunc(self, stack_pointer, nargs - KWNAMES_LEN(),
call_shape.kwnames);
kwnames);
assert((res != NULL) ^ (_PyErr_Occurred(tstate) != NULL));
call_shape.kwnames = NULL;
kwnames = NULL;
/* Free the arguments. */
for (int i = 0; i < nargs; i++) {
@ -3445,7 +3440,7 @@
}
TARGET(CALL_NO_KW_METHOD_DESCRIPTOR_NOARGS) {
assert(call_shape.kwnames == NULL);
assert(kwnames == NULL);
assert(oparg == 0 || oparg == 1);
int is_meth = is_method(stack_pointer, oparg);
int total_args = oparg + is_meth;
@ -3479,7 +3474,7 @@
}
TARGET(CALL_NO_KW_METHOD_DESCRIPTOR_FAST) {
assert(call_shape.kwnames == NULL);
assert(kwnames == NULL);
int is_meth = is_method(stack_pointer, oparg);
int total_args = oparg + is_meth;
PyMethodDescrObject *callable =
@ -3597,25 +3592,12 @@
gen->gi_frame_state = FRAME_CREATED;
gen_frame->owner = FRAME_OWNED_BY_GENERATOR;
_Py_LeaveRecursiveCallPy(tstate);
if (!frame->is_entry) {
_PyInterpreterFrame *prev = frame->previous;
_PyThreadState_PopFrame(tstate, frame);
frame = cframe.current_frame = prev;
_PyFrame_StackPush(frame, (PyObject *)gen);
goto resume_frame;
}
_Py_LeaveRecursiveCallTstate(tstate);
/* Make sure that frame is in a valid state */
frame->stacktop = 0;
frame->f_locals = NULL;
Py_INCREF(frame->f_funcobj);
Py_INCREF(frame->f_code);
/* Restore previous cframe and return. */
tstate->cframe = cframe.previous;
tstate->cframe->use_tracing = cframe.use_tracing;
assert(tstate->cframe->current_frame == frame->previous);
assert(!_PyErr_Occurred(tstate));
return (PyObject *)gen;
assert(frame != &entry_frame);
_PyInterpreterFrame *prev = frame->previous;
_PyThreadState_PopFrame(tstate, frame);
frame = cframe.current_frame = prev;
_PyFrame_StackPush(frame, (PyObject *)gen);
goto resume_frame;
}
TARGET(BUILD_SLICE) {

42
Python/opcode_targets.h generated
View file

@ -2,19 +2,20 @@ static void *opcode_targets[256] = {
&&TARGET_CACHE,
&&TARGET_POP_TOP,
&&TARGET_PUSH_NULL,
&&TARGET_BINARY_OP_ADD_FLOAT,
&&TARGET_INTERPRETER_EXIT,
&&TARGET_END_FOR,
&&TARGET_BINARY_OP_ADD_FLOAT,
&&TARGET_BINARY_OP_ADD_INT,
&&TARGET_BINARY_OP_ADD_UNICODE,
&&TARGET_BINARY_OP_GENERIC,
&&TARGET_BINARY_OP_INPLACE_ADD_UNICODE,
&&TARGET_NOP,
&&TARGET_UNARY_POSITIVE,
&&TARGET_UNARY_NEGATIVE,
&&TARGET_UNARY_NOT,
&&TARGET_BINARY_OP_INPLACE_ADD_UNICODE,
&&TARGET_BINARY_OP_MULTIPLY_FLOAT,
&&TARGET_BINARY_OP_MULTIPLY_INT,
&&TARGET_UNARY_INVERT,
&&TARGET_BINARY_OP_MULTIPLY_INT,
&&TARGET_BINARY_OP_SUBTRACT_FLOAT,
&&TARGET_BINARY_OP_SUBTRACT_INT,
&&TARGET_BINARY_SUBSCR_DICT,
@ -23,20 +24,20 @@ static void *opcode_targets[256] = {
&&TARGET_BINARY_SUBSCR_TUPLE_INT,
&&TARGET_CALL_PY_EXACT_ARGS,
&&TARGET_CALL_PY_WITH_DEFAULTS,
&&TARGET_CALL_BOUND_METHOD_EXACT_ARGS,
&&TARGET_BINARY_SUBSCR,
&&TARGET_BINARY_SLICE,
&&TARGET_STORE_SLICE,
&&TARGET_CALL_BOUND_METHOD_EXACT_ARGS,
&&TARGET_CALL_BUILTIN_CLASS,
&&TARGET_CALL_BUILTIN_FAST_WITH_KEYWORDS,
&&TARGET_GET_LEN,
&&TARGET_MATCH_MAPPING,
&&TARGET_MATCH_SEQUENCE,
&&TARGET_MATCH_KEYS,
&&TARGET_CALL_METHOD_DESCRIPTOR_FAST_WITH_KEYWORDS,
&&TARGET_CALL_BUILTIN_FAST_WITH_KEYWORDS,
&&TARGET_PUSH_EXC_INFO,
&&TARGET_CHECK_EXC_MATCH,
&&TARGET_CHECK_EG_MATCH,
&&TARGET_CALL_METHOD_DESCRIPTOR_FAST_WITH_KEYWORDS,
&&TARGET_CALL_NO_KW_BUILTIN_FAST,
&&TARGET_CALL_NO_KW_BUILTIN_O,
&&TARGET_CALL_NO_KW_ISINSTANCE,
@ -47,7 +48,6 @@ static void *opcode_targets[256] = {
&&TARGET_CALL_NO_KW_METHOD_DESCRIPTOR_O,
&&TARGET_CALL_NO_KW_STR_1,
&&TARGET_CALL_NO_KW_TUPLE_1,
&&TARGET_CALL_NO_KW_TYPE_1,
&&TARGET_WITH_EXCEPT_START,
&&TARGET_GET_AITER,
&&TARGET_GET_ANEXT,
@ -55,37 +55,37 @@ static void *opcode_targets[256] = {
&&TARGET_BEFORE_WITH,
&&TARGET_END_ASYNC_FOR,
&&TARGET_CLEANUP_THROW,
&&TARGET_CALL_NO_KW_TYPE_1,
&&TARGET_COMPARE_OP_FLOAT_JUMP,
&&TARGET_COMPARE_OP_GENERIC,
&&TARGET_COMPARE_OP_INT_JUMP,
&&TARGET_COMPARE_OP_STR_JUMP,
&&TARGET_STORE_SUBSCR,
&&TARGET_DELETE_SUBSCR,
&&TARGET_FOR_ITER_LIST,
&&TARGET_COMPARE_OP_STR_JUMP,
&&TARGET_STOPITERATION_ERROR,
&&TARGET_FOR_ITER_LIST,
&&TARGET_FOR_ITER_RANGE,
&&TARGET_FOR_ITER_GEN,
&&TARGET_LOAD_ATTR_CLASS,
&&TARGET_LOAD_ATTR_GETATTRIBUTE_OVERRIDDEN,
&&TARGET_GET_ITER,
&&TARGET_GET_YIELD_FROM_ITER,
&&TARGET_PRINT_EXPR,
&&TARGET_LOAD_BUILD_CLASS,
&&TARGET_LOAD_ATTR_GETATTRIBUTE_OVERRIDDEN,
&&TARGET_LOAD_ATTR_INSTANCE_VALUE,
&&TARGET_LOAD_ATTR_MODULE,
&&TARGET_LOAD_ASSERTION_ERROR,
&&TARGET_RETURN_GENERATOR,
&&TARGET_LOAD_ATTR_MODULE,
&&TARGET_LOAD_ATTR_PROPERTY,
&&TARGET_LOAD_ATTR_SLOT,
&&TARGET_LOAD_ATTR_WITH_HINT,
&&TARGET_LOAD_ATTR_METHOD_LAZY_DICT,
&&TARGET_LOAD_ATTR_METHOD_NO_DICT,
&&TARGET_LOAD_ATTR_METHOD_WITH_DICT,
&&TARGET_LIST_TO_TUPLE,
&&TARGET_RETURN_VALUE,
&&TARGET_IMPORT_STAR,
&&TARGET_SETUP_ANNOTATIONS,
&&TARGET_LOAD_ATTR_METHOD_WITH_VALUES,
&&TARGET_LOAD_ATTR_METHOD_WITH_DICT,
&&TARGET_ASYNC_GEN_WRAP,
&&TARGET_PREP_RERAISE_STAR,
&&TARGET_POP_EXCEPT,
@ -112,7 +112,7 @@ static void *opcode_targets[256] = {
&&TARGET_JUMP_FORWARD,
&&TARGET_JUMP_IF_FALSE_OR_POP,
&&TARGET_JUMP_IF_TRUE_OR_POP,
&&TARGET_LOAD_CONST__LOAD_FAST,
&&TARGET_LOAD_ATTR_METHOD_WITH_VALUES,
&&TARGET_POP_JUMP_IF_FALSE,
&&TARGET_POP_JUMP_IF_TRUE,
&&TARGET_LOAD_GLOBAL,
@ -120,7 +120,7 @@ static void *opcode_targets[256] = {
&&TARGET_CONTAINS_OP,
&&TARGET_RERAISE,
&&TARGET_COPY,
&&TARGET_LOAD_FAST__LOAD_CONST,
&&TARGET_LOAD_CONST__LOAD_FAST,
&&TARGET_BINARY_OP,
&&TARGET_SEND,
&&TARGET_LOAD_FAST,
@ -140,9 +140,9 @@ static void *opcode_targets[256] = {
&&TARGET_STORE_DEREF,
&&TARGET_DELETE_DEREF,
&&TARGET_JUMP_BACKWARD,
&&TARGET_LOAD_FAST__LOAD_FAST,
&&TARGET_LOAD_FAST__LOAD_CONST,
&&TARGET_CALL_FUNCTION_EX,
&&TARGET_LOAD_GLOBAL_BUILTIN,
&&TARGET_LOAD_FAST__LOAD_FAST,
&&TARGET_EXTENDED_ARG,
&&TARGET_LIST_APPEND,
&&TARGET_SET_ADD,
@ -152,27 +152,27 @@ static void *opcode_targets[256] = {
&&TARGET_YIELD_VALUE,
&&TARGET_RESUME,
&&TARGET_MATCH_CLASS,
&&TARGET_LOAD_GLOBAL_BUILTIN,
&&TARGET_LOAD_GLOBAL_MODULE,
&&TARGET_STORE_ATTR_INSTANCE_VALUE,
&&TARGET_FORMAT_VALUE,
&&TARGET_BUILD_CONST_KEY_MAP,
&&TARGET_BUILD_STRING,
&&TARGET_STORE_ATTR_INSTANCE_VALUE,
&&TARGET_STORE_ATTR_SLOT,
&&TARGET_STORE_ATTR_WITH_HINT,
&&TARGET_STORE_FAST__LOAD_FAST,
&&TARGET_STORE_FAST__STORE_FAST,
&&TARGET_LIST_EXTEND,
&&TARGET_SET_UPDATE,
&&TARGET_DICT_MERGE,
&&TARGET_DICT_UPDATE,
&&TARGET_STORE_FAST__STORE_FAST,
&&TARGET_STORE_SUBSCR_DICT,
&&TARGET_STORE_SUBSCR_LIST_INT,
&&TARGET_UNPACK_SEQUENCE_LIST,
&&TARGET_UNPACK_SEQUENCE_TUPLE,
&&TARGET_UNPACK_SEQUENCE_TWO_TUPLE,
&&TARGET_CALL,
&&TARGET_KW_NAMES,
&&_unknown_opcode,
&&TARGET_UNPACK_SEQUENCE_TWO_TUPLE,
&&_unknown_opcode,
&&_unknown_opcode,
&&_unknown_opcode,

21
Python/pylifecycle.c
View file

@ -29,6 +29,7 @@
#include "pycore_tuple.h" // _PyTuple_InitTypes()
#include "pycore_typeobject.h" // _PyTypes_InitTypes()
#include "pycore_unicodeobject.h" // _PyUnicode_InitTypes()
#include "opcode.h"
extern void _PyIO_Fini(void);
@ -779,6 +780,21 @@ pycore_init_types(PyInterpreterState *interp)
return _PyStatus_OK();
}
static const uint8_t INTERPRETER_TRAMPOLINE_INSTRUCTIONS[] = {
/* Put a NOP at the start, so that the IP points into
* the code, rather than before it */
NOP, 0,
INTERPRETER_EXIT, 0,
/* RESUME at end makes sure that the frame appears incomplete */
RESUME, 0
};
static const _PyShimCodeDef INTERPRETER_TRAMPOLINE_CODEDEF = {
INTERPRETER_TRAMPOLINE_INSTRUCTIONS,
sizeof(INTERPRETER_TRAMPOLINE_INSTRUCTIONS),
1,
"<interpreter trampoline>"
};
static PyStatus
pycore_init_builtins(PyThreadState *tstate)
@ -812,7 +828,10 @@ pycore_init_builtins(PyThreadState *tstate)
PyObject *object__getattribute__ = _PyType_Lookup(&PyBaseObject_Type, &_Py_ID(__getattribute__));
assert(object__getattribute__);
interp->callable_cache.object__getattribute__ = object__getattribute__;
interp->interpreter_trampoline = _Py_MakeShimCode(&INTERPRETER_TRAMPOLINE_CODEDEF);
if (interp->interpreter_trampoline == NULL) {
return _PyStatus_ERR("failed to create interpreter trampoline.");
}
if (_PyBuiltins_AddExceptions(bimod) < 0) {
return _PyStatus_ERR("failed to add exceptions to builtins");
}

1
Python/pystate.c
View file

@ -454,6 +454,7 @@ interpreter_clear(PyInterpreterState *interp, PyThreadState *tstate)
PyDict_Clear(interp->builtins);
Py_CLEAR(interp->sysdict);
Py_CLEAR(interp->builtins);
Py_CLEAR(interp->interpreter_trampoline);
for (int i=0; i < DICT_MAX_WATCHERS; i++) {
interp->dict_watchers[i] = NULL;

9
Python/traceback.c
View file

@ -1224,6 +1224,15 @@ dump_traceback(int fd, PyThreadState *tstate, int write_header)
if (frame == NULL) {
break;
}
if (frame->owner == FRAME_OWNED_BY_CSTACK) {
/* Trampoline frame */
frame = frame->previous;
}
if (frame == NULL) {
break;
}
/* Can't have more than one shim frame in a row */
assert(frame->owner != FRAME_OWNED_BY_CSTACK);
depth++;
}
}

18
Tools/gdb/libpython.py
View file

@ -82,6 +82,8 @@ def _sizeof_void_p():
Py_TPFLAGS_BASE_EXC_SUBCLASS = (1 << 30)
Py_TPFLAGS_TYPE_SUBCLASS = (1 << 31)
#From pycore_frame.h
FRAME_OWNED_BY_CSTACK = 3
MAX_OUTPUT_LEN=1024
@ -1077,8 +1079,8 @@ def _f_lasti(self):
first_instr = self._f_code().field("co_code_adaptive").cast(codeunit_p)
return int(prev_instr - first_instr)
def is_entry(self):
return self._f_special("is_entry", bool)
def is_shim(self):
return self._f_special("owner", int) == FRAME_OWNED_BY_CSTACK
def previous(self):
return self._f_special("previous", PyFramePtr)
@ -1821,14 +1823,14 @@ def print_summary(self):
interp_frame = self.get_pyop()
while True:
if interp_frame:
if interp_frame.is_shim():
break
line = interp_frame.get_truncated_repr(MAX_OUTPUT_LEN)
sys.stdout.write('#%i %s\n' % (self.get_index(), line))
if not interp_frame.is_optimized_out():
line = interp_frame.current_line()
if line is not None:
sys.stdout.write(' %s\n' % line.strip())
if interp_frame.is_entry():
break
else:
sys.stdout.write('#%i (unable to read python frame information)\n' % self.get_index())
break
@ -1845,13 +1847,13 @@ def print_traceback(self):
interp_frame = self.get_pyop()
while True:
if interp_frame:
if interp_frame.is_shim():
break
interp_frame.print_traceback()
if not interp_frame.is_optimized_out():
line = interp_frame.current_line()
if line is not None:
sys.stdout.write(' %s\n' % line.strip())
if interp_frame.is_entry():
break
else:
sys.stdout.write(' (unable to read python frame information)\n')
break
@ -2106,6 +2108,8 @@ def invoke(self, args, from_tty):
while True:
if not pyop_frame:
print(UNABLE_READ_INFO_PYTHON_FRAME)
if pyop_frame.is_shim():
break
sys.stdout.write('Locals for %s\n' % (pyop_frame.co_name.proxyval(set())))
@ -2114,8 +2118,6 @@ def invoke(self, args, from_tty):
% (pyop_name.proxyval(set()),
pyop_value.get_truncated_repr(MAX_OUTPUT_LEN)))
if pyop_frame.is_entry():
break
pyop_frame = pyop_frame.previous()