/* Write Python objects to files and read them back.
This is intended for writing and reading compiled Python code only;
a true persistent storage facility would be much harder, since
it would have to take circular links and sharing into account. */
#define PY_SSIZE_T_CLEAN
#include "Python.h"
#include "longintrepr.h"
#include "code.h"
#include "marshal.h"
#define ABS(x) ((x) < 0 ? -(x) : (x))
/* High water mark to determine when the marshalled object is dangerously deep
* and risks coring the interpreter. When the object stack gets this deep,
* raise an exception instead of continuing.
* On Windows debug builds, reduce this value.
*/
#if defined(MS_WINDOWS) && defined(_DEBUG)
#define MAX_MARSHAL_STACK_DEPTH 1500
#else
#define MAX_MARSHAL_STACK_DEPTH 2000
#endif
#define TYPE_NULL '0'
#define TYPE_NONE 'N'
#define TYPE_FALSE 'F'
#define TYPE_TRUE 'T'
#define TYPE_STOPITER 'S'
#define TYPE_ELLIPSIS '.'
#define TYPE_INT 'i'
/* TYPE_INT64 is deprecated. It is not
generated anymore, and support for reading it
will be removed in Python 3.4. */
#define TYPE_INT64 'I'
#define TYPE_FLOAT 'f'
#define TYPE_BINARY_FLOAT 'g'
#define TYPE_COMPLEX 'x'
#define TYPE_BINARY_COMPLEX 'y'
#define TYPE_LONG 'l'
#define TYPE_STRING 's'
#define TYPE_TUPLE '('
#define TYPE_LIST '['
#define TYPE_DICT '{'
#define TYPE_CODE 'c'
#define TYPE_UNICODE 'u'
#define TYPE_UNKNOWN '?'
#define TYPE_SET '<'
#define TYPE_FROZENSET '>'
#define WFERR_OK 0
#define WFERR_UNMARSHALLABLE 1
#define WFERR_NESTEDTOODEEP 2
#define WFERR_NOMEMORY 3
typedef struct {
FILE *fp;
int error; /* see WFERR_* values */
int depth;
/* If fp == NULL, the following are valid: */
PyObject *readable; /* Stream-like object being read from */
PyObject *str;
PyObject *current_filename;
char *ptr;
char *end;
int version;
} WFILE;
#define w_byte(c, p) if (((p)->fp)) putc((c), (p)->fp); \
else if ((p)->ptr != (p)->end) *(p)->ptr++ = (c); \
else w_more(c, p)
static void
w_more(int c, WFILE *p)
{
Py_ssize_t size, newsize;
if (p->str == NULL)
return; /* An error already occurred */
size = PyBytes_Size(p->str);
newsize = size + size + 1024;
if (newsize > 32*1024*1024) {
newsize = size + (size >> 3); /* 12.5% overallocation */
}
if (_PyBytes_Resize(&p->str, newsize) != 0) {
p->ptr = p->end = NULL;
}
else {
p->ptr = PyBytes_AS_STRING((PyBytesObject *)p->str) + size;
p->end =
PyBytes_AS_STRING((PyBytesObject *)p->str) + newsize;
*p->ptr++ = Py_SAFE_DOWNCAST(c, int, char);
}
}
static void
w_string(char *s, int n, WFILE *p)
{
if (p->fp != NULL) {
fwrite(s, 1, n, p->fp);
}
else {
while (--n >= 0) {
w_byte(*s, p);
s++;
}
}
}
static void
w_short(int x, WFILE *p)
{
w_byte((char)( x & 0xff), p);
w_byte((char)((x>> 8) & 0xff), p);
}
static void
w_long(long x, WFILE *p)
{
w_byte((char)( x & 0xff), p);
w_byte((char)((x>> 8) & 0xff), p);
w_byte((char)((x>>16) & 0xff), p);
w_byte((char)((x>>24) & 0xff), p);
}
/* We assume that Python longs are stored internally in base some power of
2**15; for the sake of portability we'll always read and write them in base
exactly 2**15. */
#define PyLong_MARSHAL_SHIFT 15
#define PyLong_MARSHAL_BASE ((short)1 << PyLong_MARSHAL_SHIFT)
#define PyLong_MARSHAL_MASK (PyLong_MARSHAL_BASE - 1)
#if PyLong_SHIFT % PyLong_MARSHAL_SHIFT != 0
#error "PyLong_SHIFT must be a multiple of PyLong_MARSHAL_SHIFT"
#endif
#define PyLong_MARSHAL_RATIO (PyLong_SHIFT / PyLong_MARSHAL_SHIFT)
static void
w_PyLong(const PyLongObject *ob, WFILE *p)
{
Py_ssize_t i, j, n, l;
digit d;
w_byte(TYPE_LONG, p);
if (Py_SIZE(ob) == 0) {
w_long((long)0, p);
return;
}
/* set l to number of base PyLong_MARSHAL_BASE digits */
n = ABS(Py_SIZE(ob));
l = (n-1) * PyLong_MARSHAL_RATIO;
d = ob->ob_digit[n-1];
assert(d != 0); /* a PyLong is always normalized */
do {
d >>= PyLong_MARSHAL_SHIFT;
l++;
} while (d != 0);
w_long((long)(Py_SIZE(ob) > 0 ? l : -l), p);
for (i=0; i < n-1; i++) {
d = ob->ob_digit[i];
for (j=0; j < PyLong_MARSHAL_RATIO; j++) {
w_short(d & PyLong_MARSHAL_MASK, p);
d >>= PyLong_MARSHAL_SHIFT;
}
assert (d == 0);
}
d = ob->ob_digit[n-1];
do {
w_short(d & PyLong_MARSHAL_MASK, p);
d >>= PyLong_MARSHAL_SHIFT;
} while (d != 0);
}
static void
w_object(PyObject *v, WFILE *p)
{
Py_ssize_t i, n;
p->depth++;
if (p->depth > MAX_MARSHAL_STACK_DEPTH) {
p->error = WFERR_NESTEDTOODEEP;
}
else if (v == NULL) {
w_byte(TYPE_NULL, p);
}
else if (v == Py_None) {
w_byte(TYPE_NONE, p);
}
else if (v == PyExc_StopIteration) {
w_byte(TYPE_STOPITER, p);
}
else if (v == Py_Ellipsis) {
w_byte(TYPE_ELLIPSIS, p);
}
else if (v == Py_False) {
w_byte(TYPE_FALSE, p);
}
else if (v == Py_True) {
w_byte(TYPE_TRUE, p);
}
else if (PyLong_CheckExact(v)) {
long x = PyLong_AsLong(v);
if ((x == -1) && PyErr_Occurred()) {
PyLongObject *ob = (PyLongObject *)v;
PyErr_Clear();
w_PyLong(ob, p);
}
else {
#if SIZEOF_LONG > 4
long y = Py_ARITHMETIC_RIGHT_SHIFT(long, x, 31);
if (y && y != -1) {
/* Too large for TYPE_INT */
w_PyLong((PyLongObject*)v, p);
}
else
#endif
{
w_byte(TYPE_INT, p);
w_long(x, p);
}
}
}
else if (PyFloat_CheckExact(v)) {
if (p->version > 1) {
unsigned char buf[8];
if (_PyFloat_Pack8(PyFloat_AsDouble(v),
buf, 1) < 0) {
p->error = WFERR_UNMARSHALLABLE;
return;
}
w_byte(TYPE_BINARY_FLOAT, p);
w_string((char*)buf, 8, p);
}
else {
char *buf = PyOS_double_to_string(PyFloat_AS_DOUBLE(v),
'g', 17, 0, NULL);
if (!buf) {
p->error = WFERR_NOMEMORY;
return;
}
n = strlen(buf);
w_byte(TYPE_FLOAT, p);
w_byte((int)n, p);
w_string(buf, (int)n, p);
PyMem_Free(buf);
}
}
else if (PyComplex_CheckExact(v)) {
if (p->version > 1) {
unsigned char buf[8];
if (_PyFloat_Pack8(PyComplex_RealAsDouble(v),
buf, 1) < 0) {
p->error = WFERR_UNMARSHALLABLE;
return;
}
w_byte(TYPE_BINARY_COMPLEX, p);
w_string((char*)buf, 8, p);
if (_PyFloat_Pack8(PyComplex_ImagAsDouble(v),
buf, 1) < 0) {
p->error = WFERR_UNMARSHALLABLE;
return;
}
w_string((char*)buf, 8, p);
}
else {
char *buf;
w_byte(TYPE_COMPLEX, p);
buf = PyOS_double_to_string(PyComplex_RealAsDouble(v),
'g', 17, 0, NULL);
if (!buf) {
p->error = WFERR_NOMEMORY;
return;
}
n = strlen(buf);
w_byte((int)n, p);
w_string(buf, (int)n, p);
PyMem_Free(buf);
buf = PyOS_double_to_string(PyComplex_ImagAsDouble(v),
'g', 17, 0, NULL);
if (!buf) {
p->error = WFERR_NOMEMORY;
return;
}
n = strlen(buf);
w_byte((int)n, p);
w_string(buf, (int)n, p);
PyMem_Free(buf);
}
}
else if (PyBytes_CheckExact(v)) {
w_byte(TYPE_STRING, p);
n = PyBytes_GET_SIZE(v);
if (n > INT_MAX) {
/* huge strings are not supported */
p->depth--;
p->error = WFERR_UNMARSHALLABLE;
return;
}
w_long((long)n, p);
w_string(PyBytes_AS_STRING(v), (int)n, p);
}
else if (PyUnicode_CheckExact(v)) {
PyObject *utf8;
utf8 = PyUnicode_AsEncodedString(v, "utf8", "surrogatepass");
if (utf8 == NULL) {
p->depth--;
p->error = WFERR_UNMARSHALLABLE;
return;
}
w_byte(TYPE_UNICODE, p);
n = PyBytes_GET_SIZE(utf8);
if (n > INT_MAX) {
p->depth--;
p->error = WFERR_UNMARSHALLABLE;
return;
}
w_long((long)n, p);
w_string(PyBytes_AS_STRING(utf8), (int)n, p);
Py_DECREF(utf8);
}
else if (PyTuple_CheckExact(v)) {
w_byte(TYPE_TUPLE, p);
n = PyTuple_Size(v);
w_long((long)n, p);
for (i = 0; i < n; i++) {
w_object(PyTuple_GET_ITEM(v, i), p);
}
}
else if (PyList_CheckExact(v)) {
w_byte(TYPE_LIST, p);
n = PyList_GET_SIZE(v);
w_long((long)n, p);
for (i = 0; i < n; i++) {
w_object(PyList_GET_ITEM(v, i), p);
}
}
else if (PyDict_CheckExact(v)) {
Py_ssize_t pos;
PyObject *key, *value;
w_byte(TYPE_DICT, p);
/* This one is NULL object terminated! */
pos = 0;
while (PyDict_Next(v, &pos, &key, &value)) {
w_object(key, p);
w_object(value, p);
}
w_object((PyObject *)NULL, p);
}
else if (PyAnySet_CheckExact(v)) {
PyObject *value, *it;
if (PyObject_TypeCheck(v, &PySet_Type))
w_byte(TYPE_SET, p);
else
w_byte(TYPE_FROZENSET, p);
n = PyObject_Size(v);
if (n == -1) {
p->depth--;
p->error = WFERR_UNMARSHALLABLE;
return;
}
w_long((long)n, p);
it = PyObject_GetIter(v);
if (it == NULL) {
p->depth--;
p->error = WFERR_UNMARSHALLABLE;
return;
}
while ((value = PyIter_Next(it)) != NULL) {
w_object(value, p);
Py_DECREF(value);
}
Py_DECREF(it);
if (PyErr_Occurred()) {
p->depth--;
p->error = WFERR_UNMARSHALLABLE;
return;
}
}
else if (PyCode_Check(v)) {
PyCodeObject *co = (PyCodeObject *)v;
w_byte(TYPE_CODE, p);
w_long(co->co_argcount, p);
w_long(co->co_kwonlyargcount, p);
w_long(co->co_nlocals, p);
w_long(co->co_stacksize, p);
w_long(co->co_flags, p);
w_object(co->co_code, p);
w_object(co->co_consts, p);
w_object(co->co_names, p);
w_object(co->co_varnames, p);
w_object(co->co_freevars, p);
w_object(co->co_cellvars, p);
w_object(co->co_filename, p);
w_object(co->co_name, p);
w_long(co->co_firstlineno, p);
w_object(co->co_lnotab, p);
}
else if (PyObject_CheckBuffer(v)) {
/* Write unknown buffer-style objects as a string */
char *s;
Py_buffer view;
if (PyObject_GetBuffer(v, &view, PyBUF_SIMPLE) != 0) {
w_byte(TYPE_UNKNOWN, p);
p->depth--;
p->error = WFERR_UNMARSHALLABLE;
return;
}
w_byte(TYPE_STRING, p);
n = view.len;
s = view.buf;
if (n > INT_MAX) {
p->depth--;
p->error = WFERR_UNMARSHALLABLE;
return;
}
w_long((long)n, p);
w_string(s, (int)n, p);
PyBuffer_Release(&view);
}
else {
w_byte(TYPE_UNKNOWN, p);
p->error = WFERR_UNMARSHALLABLE;
}
p->depth--;
}
/* version currently has no effect for writing longs. */
void
PyMarshal_WriteLongToFile(long x, FILE *fp, int version)
{
WFILE wf;
wf.fp = fp;
wf.error = WFERR_OK;
wf.depth = 0;
wf.version = version;
w_long(x, &wf);
}
void
PyMarshal_WriteObjectToFile(PyObject *x, FILE *fp, int version)
{
WFILE wf;
wf.fp = fp;
wf.error = WFERR_OK;
wf.depth = 0;
wf.version = version;
w_object(x, &wf);
}
typedef WFILE RFILE; /* Same struct with different invariants */
#define rs_byte(p) (((p)->ptr < (p)->end) ? (unsigned char)*(p)->ptr++ : EOF)
static int
r_string(char *s, int n, RFILE *p)
{
char *ptr;
int read, left;
if (!p->readable) {
if (p->fp != NULL)
/* The result fits into int because it must be <=n. */
read = (int) fread(s, 1, n, p->fp);
else {
left = (int)(p->end - p->ptr);
read = (left < n) ? left : n;
memcpy(s, p->ptr, read);
p->ptr += read;
}
}
else {
_Py_IDENTIFIER(read);
PyObject *data = _PyObject_CallMethodId(p->readable, &PyId_read, "i", n);
read = 0;
if (data != NULL) {
if (!PyBytes_Check(data)) {
PyErr_Format(PyExc_TypeError,
"f.read() returned not bytes but %.100s",
data->ob_type->tp_name);
}
else {
read = PyBytes_GET_SIZE(data);
if (read > 0) {
ptr = PyBytes_AS_STRING(data);
memcpy(s, ptr, read);
}
}
Py_DECREF(data);
}
}
if (!PyErr_Occurred() && (read < n)) {
PyErr_SetString(PyExc_EOFError, "EOF read where not expected");
}
return read;
}
static int
r_byte(RFILE *p)
{
int c = EOF;
unsigned char ch;
int n;
if (!p->readable)
c = p->fp ? getc(p->fp) : rs_byte(p);
else {
n = r_string((char *) &ch, 1, p);
if (n > 0)
c = ch;
}
return c;
}
static int
r_short(RFILE *p)
{
register short x;
unsigned char buffer[2];
r_string((char *) buffer, 2, p);
x = buffer[0];
x |= buffer[1] << 8;
/* Sign-extension, in case short greater than 16 bits */
x |= -(x & 0x8000);
return x;
}
static long
r_long(RFILE *p)
{
register long x;
unsigned char buffer[4];
r_string((char *) buffer, 4, p);
x = buffer[0];
x |= (long)buffer[1] << 8;
x |= (long)buffer[2] << 16;
x |= (long)buffer[3] << 24;
#if SIZEOF_LONG > 4
/* Sign extension for 64-bit machines */
x |= -(x & 0x80000000L);
#endif
return x;
}
/* r_long64 deals with the TYPE_INT64 code. On a machine with
sizeof(long) > 4, it returns a Python int object, else a Python long
object. Note that w_long64 writes out TYPE_INT if 32 bits is enough,
so there's no inefficiency here in returning a PyLong on 32-bit boxes
for everything written via TYPE_INT64 (i.e., if an int is written via
TYPE_INT64, it *needs* more than 32 bits).
*/
static PyObject *
r_long64(RFILE *p)
{
PyObject *result = NULL;
long lo4 = r_long(p);
long hi4 = r_long(p);
if (!PyErr_Occurred()) {
#if SIZEOF_LONG > 4
long x = (hi4 << 32) | (lo4 & 0xFFFFFFFFL);
result = PyLong_FromLong(x);
#else
unsigned char buf[8];
int one = 1;
int is_little_endian = (int)*(char*)&one;
if (is_little_endian) {
memcpy(buf, &lo4, 4);
memcpy(buf+4, &hi4, 4);
}
else {
memcpy(buf, &hi4, 4);
memcpy(buf+4, &lo4, 4);
}
result = _PyLong_FromByteArray(buf, 8, is_little_endian, 1);
#endif
}
return result;
}
static PyObject *
r_PyLong(RFILE *p)
{
PyLongObject *ob;
int size, i, j, md, shorts_in_top_digit;
long n;
digit d;
n = r_long(p);
if (PyErr_Occurred())
return NULL;
if (n == 0)
return (PyObject *)_PyLong_New(0);
if (n < -INT_MAX || n > INT_MAX) {
PyErr_SetString(PyExc_ValueError,
"bad marshal data (long size out of range)");
return NULL;
}
size = 1 + (ABS(n) - 1) / PyLong_MARSHAL_RATIO;
shorts_in_top_digit = 1 + (ABS(n) - 1) % PyLong_MARSHAL_RATIO;
ob = _PyLong_New(size);
if (ob == NULL)
return NULL;
Py_SIZE(ob) = n > 0 ? size : -size;
for (i = 0; i < size-1; i++) {
d = 0;
for (j=0; j < PyLong_MARSHAL_RATIO; j++) {
md = r_short(p);
if (PyErr_Occurred())
break;
if (md < 0 || md > PyLong_MARSHAL_BASE)
goto bad_digit;
d += (digit)md << j*PyLong_MARSHAL_SHIFT;
}
ob->ob_digit[i] = d;
}
d = 0;
for (j=0; j < shorts_in_top_digit; j++) {
md = r_short(p);
if (PyErr_Occurred())
break;
if (md < 0 || md > PyLong_MARSHAL_BASE)
goto bad_digit;
/* topmost marshal digit should be nonzero */
if (md == 0 && j == shorts_in_top_digit - 1) {
Py_DECREF(ob);
PyErr_SetString(PyExc_ValueError,
"bad marshal data (unnormalized long data)");
return NULL;
}
d += (digit)md << j*PyLong_MARSHAL_SHIFT;
}
if (PyErr_Occurred()) {
Py_DECREF(ob);
return NULL;
}
/* top digit should be nonzero, else the resulting PyLong won't be
normalized */
ob->ob_digit[size-1] = d;
return (PyObject *)ob;
bad_digit:
Py_DECREF(ob);
PyErr_SetString(PyExc_ValueError,
"bad marshal data (digit out of range in long)");
return NULL;
}
static PyObject *
r_object(RFILE *p)
{
/* NULL is a valid return value, it does not necessarily means that
an exception is set. */
PyObject *v, *v2;
long i, n;
int type = r_byte(p);
PyObject *retval;
p->depth++;
if (p->depth > MAX_MARSHAL_STACK_DEPTH) {
p->depth--;
PyErr_SetString(PyExc_ValueError, "recursion limit exceeded");
return NULL;
}
switch (type) {
case EOF:
PyErr_SetString(PyExc_EOFError,
"EOF read where object expected");
retval = NULL;
break;
case TYPE_NULL:
retval = NULL;
break;
case TYPE_NONE:
Py_INCREF(Py_None);
retval = Py_None;
break;
case TYPE_STOPITER:
Py_INCREF(PyExc_StopIteration);
retval = PyExc_StopIteration;
break;
case TYPE_ELLIPSIS:
Py_INCREF(Py_Ellipsis);
retval = Py_Ellipsis;
break;
case TYPE_FALSE:
Py_INCREF(Py_False);
retval = Py_False;
break;
case TYPE_TRUE:
Py_INCREF(Py_True);
retval = Py_True;
break;
case TYPE_INT:
n = r_long(p);
retval = PyErr_Occurred() ? NULL : PyLong_FromLong(n);
break;
case TYPE_INT64:
retval = r_long64(p);
break;
case TYPE_LONG:
retval = r_PyLong(p);
break;
case TYPE_FLOAT:
{
char buf[256];
double dx;
retval = NULL;
n = r_byte(p);
if (n == EOF || r_string(buf, (int)n, p) != n) {
PyErr_SetString(PyExc_EOFError,
"EOF read where object expected");
break;
}
buf[n] = '\0';
dx = PyOS_string_to_double(buf, NULL, NULL);
if (dx == -1.0 && PyErr_Occurred())
break;
retval = PyFloat_FromDouble(dx);
break;
}
case TYPE_BINARY_FLOAT:
{
unsigned char buf[8];
double x;
if (r_string((char*)buf, 8, p) != 8) {
PyErr_SetString(PyExc_EOFError,
"EOF read where object expected");
retval = NULL;
break;
}
x = _PyFloat_Unpack8(buf, 1);
if (x == -1.0 && PyErr_Occurred()) {
retval = NULL;
break;
}
retval = PyFloat_FromDouble(x);
break;
}
case TYPE_COMPLEX:
{
char buf[256];
Py_complex c;
retval = NULL;
n = r_byte(p);
if (n == EOF || r_string(buf, (int)n, p) != n) {
PyErr_SetString(PyExc_EOFError,
"EOF read where object expected");
break;
}
buf[n] = '\0';
c.real = PyOS_string_to_double(buf, NULL, NULL);
if (c.real == -1.0 && PyErr_Occurred())
break;
n = r_byte(p);
if (n == EOF || r_string(buf, (int)n, p) != n) {
PyErr_SetString(PyExc_EOFError,
"EOF read where object expected");
break;
}
buf[n] = '\0';
c.imag = PyOS_string_to_double(buf, NULL, NULL);
if (c.imag == -1.0 && PyErr_Occurred())
break;
retval = PyComplex_FromCComplex(c);
break;
}
case TYPE_BINARY_COMPLEX:
{
unsigned char buf[8];
Py_complex c;
if (r_string((char*)buf, 8, p) != 8) {
PyErr_SetString(PyExc_EOFError,
"EOF read where object expected");
retval = NULL;
break;
}
c.real = _PyFloat_Unpack8(buf, 1);
if (c.real == -1.0 && PyErr_Occurred()) {
retval = NULL;
break;
}
if (r_string((char*)buf, 8, p) != 8) {
PyErr_SetString(PyExc_EOFError,
"EOF read where object expected");
retval = NULL;
break;
}
c.imag = _PyFloat_Unpack8(buf, 1);
if (c.imag == -1.0 && PyErr_Occurred()) {
retval = NULL;
break;
}
retval = PyComplex_FromCComplex(c);
break;
}
case TYPE_STRING:
n = r_long(p);
if (PyErr_Occurred()) {
retval = NULL;
break;
}
if (n < 0 || n > INT_MAX) {
PyErr_SetString(PyExc_ValueError, "bad marshal data (string size out of range)");
retval = NULL;
break;
}
v = PyBytes_FromStringAndSize((char *)NULL, n);
if (v == NULL) {
retval = NULL;
break;
}
if (r_string(PyBytes_AS_STRING(v), (int)n, p) != n) {
Py_DECREF(v);
PyErr_SetString(PyExc_EOFError,
"EOF read where object expected");
retval = NULL;
break;
}
retval = v;
break;
case TYPE_UNICODE:
{
char *buffer;
n = r_long(p);
if (PyErr_Occurred()) {
retval = NULL;
break;
}
if (n < 0 || n > INT_MAX) {
PyErr_SetString(PyExc_ValueError, "bad marshal data (unicode size out of range)");
retval = NULL;
break;
}
buffer = PyMem_NEW(char, n);
if (buffer == NULL) {
retval = PyErr_NoMemory();
break;
}
if (r_string(buffer, (int)n, p) != n) {
PyMem_DEL(buffer);
PyErr_SetString(PyExc_EOFError,
"EOF read where object expected");
retval = NULL;
break;
}
v = PyUnicode_DecodeUTF8(buffer, n, "surrogatepass");
PyMem_DEL(buffer);
retval = v;
break;
}
case TYPE_TUPLE:
n = r_long(p);
if (PyErr_Occurred()) {
retval = NULL;
break;
}
if (n < 0 || n > INT_MAX) {
PyErr_SetString(PyExc_ValueError, "bad marshal data (tuple size out of range)");
retval = NULL;
break;
}
v = PyTuple_New((int)n);
if (v == NULL) {
retval = NULL;
break;
}
for (i = 0; i < n; i++) {
v2 = r_object(p);
if ( v2 == NULL ) {
if (!PyErr_Occurred())
PyErr_SetString(PyExc_TypeError,
"NULL object in marshal data for tuple");
Py_DECREF(v);
v = NULL;
break;
}
PyTuple_SET_ITEM(v, (int)i, v2);
}
retval = v;
break;
case TYPE_LIST:
n = r_long(p);
if (PyErr_Occurred()) {
retval = NULL;
break;
}
if (n < 0 || n > INT_MAX) {
PyErr_SetString(PyExc_ValueError, "bad marshal data (list size out of range)");
retval = NULL;
break;
}
v = PyList_New((int)n);
if (v == NULL) {
retval = NULL;
break;
}
for (i = 0; i < n; i++) {
v2 = r_object(p);
if ( v2 == NULL ) {
if (!PyErr_Occurred())
PyErr_SetString(PyExc_TypeError,
"NULL object in marshal data for list");
Py_DECREF(v);
v = NULL;
break;
}
PyList_SET_ITEM(v, (int)i, v2);
}
retval = v;
break;
case TYPE_DICT:
v = PyDict_New();
if (v == NULL) {
retval = NULL;
break;
}
for (;;) {
PyObject *key, *val;
key = r_object(p);
if (key == NULL)
break;
val = r_object(p);
if (val != NULL)
PyDict_SetItem(v, key, val);
Py_DECREF(key);
Py_XDECREF(val);
}
if (PyErr_Occurred()) {
Py_DECREF(v);
v = NULL;
}
retval = v;
break;
case TYPE_SET:
case TYPE_FROZENSET:
n = r_long(p);
if (PyErr_Occurred()) {
retval = NULL;
break;
}
if (n < 0 || n > INT_MAX) {
PyErr_SetString(PyExc_ValueError, "bad marshal data (set size out of range)");
retval = NULL;
break;
}
v = (type == TYPE_SET) ? PySet_New(NULL) : PyFrozenSet_New(NULL);
if (v == NULL) {
retval = NULL;
break;
}
for (i = 0; i < n; i++) {
v2 = r_object(p);
if ( v2 == NULL ) {
if (!PyErr_Occurred())
PyErr_SetString(PyExc_TypeError,
"NULL object in marshal data for set");
Py_DECREF(v);
v = NULL;
break;
}
if (PySet_Add(v, v2) == -1) {
Py_DECREF(v);
Py_DECREF(v2);
v = NULL;
break;
}
Py_DECREF(v2);
}
retval = v;
break;
case TYPE_CODE:
{
int argcount;
int kwonlyargcount;
int nlocals;
int stacksize;
int flags;
PyObject *code = NULL;
PyObject *consts = NULL;
PyObject *names = NULL;
PyObject *varnames = NULL;
PyObject *freevars = NULL;
PyObject *cellvars = NULL;
PyObject *filename = NULL;
PyObject *name = NULL;
int firstlineno;
PyObject *lnotab = NULL;
v = NULL;
/* XXX ignore long->int overflows for now */
argcount = (int)r_long(p);
if (PyErr_Occurred())
goto code_error;
kwonlyargcount = (int)r_long(p);
if (PyErr_Occurred())
goto code_error;
nlocals = (int)r_long(p);
if (PyErr_Occurred())
goto code_error;
stacksize = (int)r_long(p);
if (PyErr_Occurred())
goto code_error;
flags = (int)r_long(p);
if (PyErr_Occurred())
goto code_error;
code = r_object(p);
if (code == NULL)
goto code_error;
consts = r_object(p);
if (consts == NULL)
goto code_error;
names = r_object(p);
if (names == NULL)
goto code_error;
varnames = r_object(p);
if (varnames == NULL)
goto code_error;
freevars = r_object(p);
if (freevars == NULL)
goto code_error;
cellvars = r_object(p);
if (cellvars == NULL)
goto code_error;
filename = r_object(p);
if (filename == NULL)
goto code_error;
if (PyUnicode_CheckExact(filename)) {
if (p->current_filename != NULL) {
if (!PyUnicode_Compare(filename, p->current_filename)) {
Py_DECREF(filename);
Py_INCREF(p->current_filename);
filename = p->current_filename;
}
}
else {
p->current_filename = filename;
}
}
name = r_object(p);
if (name == NULL)
goto code_error;
firstlineno = (int)r_long(p);
lnotab = r_object(p);
if (lnotab == NULL)
goto code_error;
v = (PyObject *) PyCode_New(
argcount, kwonlyargcount,
nlocals, stacksize, flags,
code, consts, names, varnames,
freevars, cellvars, filename, name,
firstlineno, lnotab);
code_error:
Py_XDECREF(code);
Py_XDECREF(consts);
Py_XDECREF(names);
Py_XDECREF(varnames);
Py_XDECREF(freevars);
Py_XDECREF(cellvars);
Py_XDECREF(filename);
Py_XDECREF(name);
Py_XDECREF(lnotab);
}
retval = v;
break;
default:
/* Bogus data got written, which isn't ideal.
This will let you keep working and recover. */
PyErr_SetString(PyExc_ValueError, "bad marshal data (unknown type code)");
retval = NULL;
break;
}
p->depth--;
return retval;
}
static PyObject *
read_object(RFILE *p)
{
PyObject *v;
if (PyErr_Occurred()) {
fprintf(stderr, "XXX readobject called with exception set\n");
return NULL;
}
v = r_object(p);
if (v == NULL && !PyErr_Occurred())
PyErr_SetString(PyExc_TypeError, "NULL object in marshal data for object");
return v;
}
int
PyMarshal_ReadShortFromFile(FILE *fp)
{
RFILE rf;
assert(fp);
rf.readable = NULL;
rf.fp = fp;
rf.current_filename = NULL;
rf.end = rf.ptr = NULL;
return r_short(&rf);
}
long
PyMarshal_ReadLongFromFile(FILE *fp)
{
RFILE rf;
rf.fp = fp;
rf.readable = NULL;
rf.current_filename = NULL;
rf.ptr = rf.end = NULL;
return r_long(&rf);
}
#ifdef HAVE_FSTAT
/* Return size of file in bytes; < 0 if unknown. */
static off_t
getfilesize(FILE *fp)
{
struct stat st;
if (fstat(fileno(fp), &st) != 0)
return -1;
else
return st.st_size;
}
#endif
/* If we can get the size of the file up-front, and it's reasonably small,
* read it in one gulp and delegate to ...FromString() instead. Much quicker
* than reading a byte at a time from file; speeds .pyc imports.
* CAUTION: since this may read the entire remainder of the file, don't
* call it unless you know you're done with the file.
*/
PyObject *
PyMarshal_ReadLastObjectFromFile(FILE *fp)
{
/* REASONABLE_FILE_LIMIT is by defn something big enough for Tkinter.pyc. */
#define REASONABLE_FILE_LIMIT (1L << 18)
#ifdef HAVE_FSTAT
off_t filesize;
filesize = getfilesize(fp);
if (filesize > 0 && filesize <= REASONABLE_FILE_LIMIT) {
char* pBuf = (char *)PyMem_MALLOC(filesize);
if (pBuf != NULL) {
PyObject* v;
size_t n;
/* filesize must fit into an int, because it
is smaller than REASONABLE_FILE_LIMIT */
n = fread(pBuf, 1, (int)filesize, fp);
v = PyMarshal_ReadObjectFromString(pBuf, n);
PyMem_FREE(pBuf);
return v;
}
}
#endif
/* We don't have fstat, or we do but the file is larger than
* REASONABLE_FILE_LIMIT or malloc failed -- read a byte at a time.
*/
return PyMarshal_ReadObjectFromFile(fp);
#undef REASONABLE_FILE_LIMIT
}
PyObject *
PyMarshal_ReadObjectFromFile(FILE *fp)
{
RFILE rf;
PyObject *result;
rf.fp = fp;
rf.readable = NULL;
rf.current_filename = NULL;
rf.depth = 0;
rf.ptr = rf.end = NULL;
result = r_object(&rf);
return result;
}
PyObject *
PyMarshal_ReadObjectFromString(char *str, Py_ssize_t len)
{
RFILE rf;
PyObject *result;
rf.fp = NULL;
rf.readable = NULL;
rf.current_filename = NULL;
rf.ptr = str;
rf.end = str + len;
rf.depth = 0;
result = r_object(&rf);
return result;
}
PyObject *
PyMarshal_WriteObjectToString(PyObject *x, int version)
{
WFILE wf;
wf.fp = NULL;
wf.readable = NULL;
wf.str = PyBytes_FromStringAndSize((char *)NULL, 50);
if (wf.str == NULL)
return NULL;
wf.ptr = PyBytes_AS_STRING((PyBytesObject *)wf.str);
wf.end = wf.ptr + PyBytes_Size(wf.str);
wf.error = WFERR_OK;
wf.depth = 0;
wf.version = version;
w_object(x, &wf);
if (wf.str != NULL) {
char *base = PyBytes_AS_STRING((PyBytesObject *)wf.str);
if (wf.ptr - base > PY_SSIZE_T_MAX) {
Py_DECREF(wf.str);
PyErr_SetString(PyExc_OverflowError,
"too much marshal data for a string");
return NULL;
}
if (_PyBytes_Resize(&wf.str, (Py_ssize_t)(wf.ptr - base)) < 0)
return NULL;
}
if (wf.error != WFERR_OK) {
Py_XDECREF(wf.str);
if (wf.error == WFERR_NOMEMORY)
PyErr_NoMemory();
else
PyErr_SetString(PyExc_ValueError,
(wf.error==WFERR_UNMARSHALLABLE)?"unmarshallable object"
:"object too deeply nested to marshal");
return NULL;
}
return wf.str;
}
/* And an interface for Python programs... */
static PyObject *
marshal_dump(PyObject *self, PyObject *args)
{
/* XXX Quick hack -- need to do this differently */
PyObject *x;
PyObject *f;
int version = Py_MARSHAL_VERSION;
PyObject *s;
PyObject *res;
_Py_IDENTIFIER(write);
if (!PyArg_ParseTuple(args, "OO|i:dump", &x, &f, &version))
return NULL;
s = PyMarshal_WriteObjectToString(x, version);
if (s == NULL)
return NULL;
res = _PyObject_CallMethodId(f, &PyId_write, "O", s);
Py_DECREF(s);
return res;
}
PyDoc_STRVAR(dump_doc,
"dump(value, file[, version])\n\
\n\
Write the value on the open file. The value must be a supported type.\n\
The file must be an open file object such as sys.stdout or returned by\n\
open() or os.popen(). It must be opened in binary mode ('wb' or 'w+b').\n\
\n\
If the value has (or contains an object that has) an unsupported type, a\n\
ValueError exception is raised — but garbage data will also be written\n\
to the file. The object will not be properly read back by load()\n\
\n\
The version argument indicates the data format that dump should use.");
static PyObject *
marshal_load(PyObject *self, PyObject *f)
{
PyObject *data, *result;
_Py_IDENTIFIER(read);
RFILE rf;
/*
* Make a call to the read method, but read zero bytes.
* This is to ensure that the object passed in at least
* has a read method which returns bytes.
*/
data = _PyObject_CallMethodId(f, &PyId_read, "i", 0);
if (data == NULL)
return NULL;
if (!PyBytes_Check(data)) {
PyErr_Format(PyExc_TypeError,
"f.read() returned not bytes but %.100s",
data->ob_type->tp_name);
result = NULL;
}
else {
rf.depth = 0;
rf.fp = NULL;
rf.readable = f;
rf.current_filename = NULL;
result = read_object(&rf);
}
Py_DECREF(data);
return result;
}
PyDoc_STRVAR(load_doc,
"load(file)\n\
\n\
Read one value from the open file and return it. If no valid value is\n\
read (e.g. because the data has a different Python version’s\n\
incompatible marshal format), raise EOFError, ValueError or TypeError.\n\
The file must be an open file object opened in binary mode ('rb' or\n\
'r+b').\n\
\n\
Note: If an object containing an unsupported type was marshalled with\n\
dump(), load() will substitute None for the unmarshallable type.");
static PyObject *
marshal_dumps(PyObject *self, PyObject *args)
{
PyObject *x;
int version = Py_MARSHAL_VERSION;
if (!PyArg_ParseTuple(args, "O|i:dumps", &x, &version))
return NULL;
return PyMarshal_WriteObjectToString(x, version);
}
PyDoc_STRVAR(dumps_doc,
"dumps(value[, version])\n\
\n\
Return the string that would be written to a file by dump(value, file).\n\
The value must be a supported type. Raise a ValueError exception if\n\
value has (or contains an object that has) an unsupported type.\n\
\n\
The version argument indicates the data format that dumps should use.");
static PyObject *
marshal_loads(PyObject *self, PyObject *args)
{
RFILE rf;
Py_buffer p;
char *s;
Py_ssize_t n;
PyObject* result;
if (!PyArg_ParseTuple(args, "y*:loads", &p))
return NULL;
s = p.buf;
n = p.len;
rf.fp = NULL;
rf.readable = NULL;
rf.current_filename = NULL;
rf.ptr = s;
rf.end = s + n;
rf.depth = 0;
result = read_object(&rf);
PyBuffer_Release(&p);
return result;
}
PyDoc_STRVAR(loads_doc,
"loads(bytes)\n\
\n\
Convert the bytes object to a value. If no valid value is found, raise\n\
EOFError, ValueError or TypeError. Extra characters in the input are\n\
ignored.");
static PyMethodDef marshal_methods[] = {
{"dump", marshal_dump, METH_VARARGS, dump_doc},
{"load", marshal_load, METH_O, load_doc},
{"dumps", marshal_dumps, METH_VARARGS, dumps_doc},
{"loads", marshal_loads, METH_VARARGS, loads_doc},
{NULL, NULL} /* sentinel */
};
PyDoc_STRVAR(module_doc,
"This module contains functions that can read and write Python values in\n\
a binary format. The format is specific to Python, but independent of\n\
machine architecture issues.\n\
\n\
Not all Python object types are supported; in general, only objects\n\
whose value is independent from a particular invocation of Python can be\n\
written and read by this module. The following types are supported:\n\
None, integers, floating point numbers, strings, bytes, bytearrays,\n\
tuples, lists, sets, dictionaries, and code objects, where it\n\
should be understood that tuples, lists and dictionaries are only\n\
supported as long as the values contained therein are themselves\n\
supported; and recursive lists and dictionaries should not be written\n\
(they will cause infinite loops).\n\
\n\
Variables:\n\
\n\
version -- indicates the format that the module uses. Version 0 is the\n\
historical format, version 1 shares interned strings and version 2\n\
uses a binary format for floating point numbers.\n\
\n\
Functions:\n\
\n\
dump() -- write value to a file\n\
load() -- read value from a file\n\
dumps() -- write value to a string\n\
loads() -- read value from a string");
static struct PyModuleDef marshalmodule = {
PyModuleDef_HEAD_INIT,
"marshal",
module_doc,
0,
marshal_methods,
NULL,
NULL,
NULL,
NULL
};
PyMODINIT_FUNC
PyMarshal_Init(void)
{
PyObject *mod = PyModule_Create(&marshalmodule);
if (mod == NULL)
return NULL;
PyModule_AddIntConstant(mod, "version", Py_MARSHAL_VERSION);
return mod;
}
1103' href='#n1103'>1103
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#include "Python.h"
#include "opcode_ids.h"
#include "pycore_bitutils.h" // _Py_popcount32
#include "pycore_call.h"
#include "pycore_ceval.h" // _PY_EVAL_EVENTS_BITS
#include "pycore_code.h" // _PyCode_Clear_Executors()
#include "pycore_critical_section.h"
#include "pycore_frame.h"
#include "pycore_interp.h"
#include "pycore_long.h"
#include "pycore_modsupport.h" // _PyModule_CreateInitialized()
#include "pycore_namespace.h"
#include "pycore_object.h"
#include "pycore_opcode_metadata.h" // IS_VALID_OPCODE, _PyOpcode_Caches
#include "pycore_pyatomic_ft_wrappers.h" // FT_ATOMIC_STORE_UINTPTR_RELEASE
#include "pycore_pyerrors.h"
#include "pycore_pystate.h" // _PyInterpreterState_GET()
/* Uncomment this to dump debugging output when assertions fail */
// #define INSTRUMENT_DEBUG 1
#if defined(Py_DEBUG) && defined(Py_GIL_DISABLED)
#define ASSERT_WORLD_STOPPED_OR_LOCKED(obj) \
if (!_PyInterpreterState_GET()->stoptheworld.world_stopped) { \
_Py_CRITICAL_SECTION_ASSERT_OBJECT_LOCKED(obj); \
}
#define ASSERT_WORLD_STOPPED() assert(_PyInterpreterState_GET()->stoptheworld.world_stopped);
#else
#define ASSERT_WORLD_STOPPED_OR_LOCKED(obj)
#define ASSERT_WORLD_STOPPED()
#endif
#ifdef Py_GIL_DISABLED
#define LOCK_CODE(code) \
assert(!_PyInterpreterState_GET()->stoptheworld.world_stopped); \
Py_BEGIN_CRITICAL_SECTION(code)
#define UNLOCK_CODE() Py_END_CRITICAL_SECTION()
#else
#define LOCK_CODE(code)
#define UNLOCK_CODE()
#endif
PyObject _PyInstrumentation_DISABLE = _PyObject_HEAD_INIT(&PyBaseObject_Type);
PyObject _PyInstrumentation_MISSING = _PyObject_HEAD_INIT(&PyBaseObject_Type);
static const int8_t EVENT_FOR_OPCODE[256] = {
[RETURN_CONST] = PY_MONITORING_EVENT_PY_RETURN,
[INSTRUMENTED_RETURN_CONST] = PY_MONITORING_EVENT_PY_RETURN,
[RETURN_VALUE] = PY_MONITORING_EVENT_PY_RETURN,
[INSTRUMENTED_RETURN_VALUE] = PY_MONITORING_EVENT_PY_RETURN,
[CALL] = PY_MONITORING_EVENT_CALL,
[INSTRUMENTED_CALL] = PY_MONITORING_EVENT_CALL,
[CALL_KW] = PY_MONITORING_EVENT_CALL,
[INSTRUMENTED_CALL_KW] = PY_MONITORING_EVENT_CALL,
[CALL_FUNCTION_EX] = PY_MONITORING_EVENT_CALL,
[INSTRUMENTED_CALL_FUNCTION_EX] = PY_MONITORING_EVENT_CALL,
[LOAD_SUPER_ATTR] = PY_MONITORING_EVENT_CALL,
[INSTRUMENTED_LOAD_SUPER_ATTR] = PY_MONITORING_EVENT_CALL,
[RESUME] = -1,
[YIELD_VALUE] = PY_MONITORING_EVENT_PY_YIELD,
[INSTRUMENTED_YIELD_VALUE] = PY_MONITORING_EVENT_PY_YIELD,
[JUMP_FORWARD] = PY_MONITORING_EVENT_JUMP,
[JUMP_BACKWARD] = PY_MONITORING_EVENT_JUMP,
[POP_JUMP_IF_FALSE] = PY_MONITORING_EVENT_BRANCH,
[POP_JUMP_IF_TRUE] = PY_MONITORING_EVENT_BRANCH,
[POP_JUMP_IF_NONE] = PY_MONITORING_EVENT_BRANCH,
[POP_JUMP_IF_NOT_NONE] = PY_MONITORING_EVENT_BRANCH,
[INSTRUMENTED_JUMP_FORWARD] = PY_MONITORING_EVENT_JUMP,
[INSTRUMENTED_JUMP_BACKWARD] = PY_MONITORING_EVENT_JUMP,
[INSTRUMENTED_POP_JUMP_IF_FALSE] = PY_MONITORING_EVENT_BRANCH,
[INSTRUMENTED_POP_JUMP_IF_TRUE] = PY_MONITORING_EVENT_BRANCH,
[INSTRUMENTED_POP_JUMP_IF_NONE] = PY_MONITORING_EVENT_BRANCH,
[INSTRUMENTED_POP_JUMP_IF_NOT_NONE] = PY_MONITORING_EVENT_BRANCH,
[FOR_ITER] = PY_MONITORING_EVENT_BRANCH,
[INSTRUMENTED_FOR_ITER] = PY_MONITORING_EVENT_BRANCH,
[END_FOR] = PY_MONITORING_EVENT_STOP_ITERATION,
[INSTRUMENTED_END_FOR] = PY_MONITORING_EVENT_STOP_ITERATION,
[END_SEND] = PY_MONITORING_EVENT_STOP_ITERATION,
[INSTRUMENTED_END_SEND] = PY_MONITORING_EVENT_STOP_ITERATION,
};
static const uint8_t DE_INSTRUMENT[256] = {
[INSTRUMENTED_RESUME] = RESUME,
[INSTRUMENTED_RETURN_VALUE] = RETURN_VALUE,
[INSTRUMENTED_RETURN_CONST] = RETURN_CONST,
[INSTRUMENTED_CALL] = CALL,
[INSTRUMENTED_CALL_KW] = CALL_KW,
[INSTRUMENTED_CALL_FUNCTION_EX] = CALL_FUNCTION_EX,
[INSTRUMENTED_YIELD_VALUE] = YIELD_VALUE,
[INSTRUMENTED_JUMP_FORWARD] = JUMP_FORWARD,
[INSTRUMENTED_JUMP_BACKWARD] = JUMP_BACKWARD,
[INSTRUMENTED_POP_JUMP_IF_FALSE] = POP_JUMP_IF_FALSE,
[INSTRUMENTED_POP_JUMP_IF_TRUE] = POP_JUMP_IF_TRUE,
[INSTRUMENTED_POP_JUMP_IF_NONE] = POP_JUMP_IF_NONE,
[INSTRUMENTED_POP_JUMP_IF_NOT_NONE] = POP_JUMP_IF_NOT_NONE,
[INSTRUMENTED_FOR_ITER] = FOR_ITER,
[INSTRUMENTED_END_FOR] = END_FOR,
[INSTRUMENTED_END_SEND] = END_SEND,
[INSTRUMENTED_LOAD_SUPER_ATTR] = LOAD_SUPER_ATTR,
};
static const uint8_t INSTRUMENTED_OPCODES[256] = {
[RETURN_CONST] = INSTRUMENTED_RETURN_CONST,
[INSTRUMENTED_RETURN_CONST] = INSTRUMENTED_RETURN_CONST,
[RETURN_VALUE] = INSTRUMENTED_RETURN_VALUE,
[INSTRUMENTED_RETURN_VALUE] = INSTRUMENTED_RETURN_VALUE,
[CALL] = INSTRUMENTED_CALL,
[INSTRUMENTED_CALL] = INSTRUMENTED_CALL,
[CALL_KW] = INSTRUMENTED_CALL_KW,
[INSTRUMENTED_CALL_KW] = INSTRUMENTED_CALL_KW,
[CALL_FUNCTION_EX] = INSTRUMENTED_CALL_FUNCTION_EX,
[INSTRUMENTED_CALL_FUNCTION_EX] = INSTRUMENTED_CALL_FUNCTION_EX,
[YIELD_VALUE] = INSTRUMENTED_YIELD_VALUE,
[INSTRUMENTED_YIELD_VALUE] = INSTRUMENTED_YIELD_VALUE,
[RESUME] = INSTRUMENTED_RESUME,
[INSTRUMENTED_RESUME] = INSTRUMENTED_RESUME,
[JUMP_FORWARD] = INSTRUMENTED_JUMP_FORWARD,
[INSTRUMENTED_JUMP_FORWARD] = INSTRUMENTED_JUMP_FORWARD,
[JUMP_BACKWARD] = INSTRUMENTED_JUMP_BACKWARD,
[INSTRUMENTED_JUMP_BACKWARD] = INSTRUMENTED_JUMP_BACKWARD,
[POP_JUMP_IF_FALSE] = INSTRUMENTED_POP_JUMP_IF_FALSE,
[INSTRUMENTED_POP_JUMP_IF_FALSE] = INSTRUMENTED_POP_JUMP_IF_FALSE,
[POP_JUMP_IF_TRUE] = INSTRUMENTED_POP_JUMP_IF_TRUE,
[INSTRUMENTED_POP_JUMP_IF_TRUE] = INSTRUMENTED_POP_JUMP_IF_TRUE,
[POP_JUMP_IF_NONE] = INSTRUMENTED_POP_JUMP_IF_NONE,
[INSTRUMENTED_POP_JUMP_IF_NONE] = INSTRUMENTED_POP_JUMP_IF_NONE,
[POP_JUMP_IF_NOT_NONE] = INSTRUMENTED_POP_JUMP_IF_NOT_NONE,
[INSTRUMENTED_POP_JUMP_IF_NOT_NONE] = INSTRUMENTED_POP_JUMP_IF_NOT_NONE,
[END_FOR] = INSTRUMENTED_END_FOR,
[INSTRUMENTED_END_FOR] = INSTRUMENTED_END_FOR,
[END_SEND] = INSTRUMENTED_END_SEND,
[INSTRUMENTED_END_SEND] = INSTRUMENTED_END_SEND,
[FOR_ITER] = INSTRUMENTED_FOR_ITER,
[INSTRUMENTED_FOR_ITER] = INSTRUMENTED_FOR_ITER,
[LOAD_SUPER_ATTR] = INSTRUMENTED_LOAD_SUPER_ATTR,
[INSTRUMENTED_LOAD_SUPER_ATTR] = INSTRUMENTED_LOAD_SUPER_ATTR,
[INSTRUMENTED_LINE] = INSTRUMENTED_LINE,
[INSTRUMENTED_INSTRUCTION] = INSTRUMENTED_INSTRUCTION,
};
static inline bool
opcode_has_event(int opcode)
{
return (
opcode != INSTRUMENTED_LINE &&
INSTRUMENTED_OPCODES[opcode] > 0
);
}
static inline bool
is_instrumented(int opcode)
{
assert(opcode != 0);
assert(opcode != RESERVED);
assert(opcode != ENTER_EXECUTOR);
return opcode >= MIN_INSTRUMENTED_OPCODE;
}
#ifndef NDEBUG
static inline bool
monitors_equals(_Py_LocalMonitors a, _Py_LocalMonitors b)
{
for (int i = 0; i < _PY_MONITORING_LOCAL_EVENTS; i++) {
if (a.tools[i] != b.tools[i]) {
return false;
}
}
return true;
}
#endif
static inline _Py_LocalMonitors
monitors_sub(_Py_LocalMonitors a, _Py_LocalMonitors b)
{
_Py_LocalMonitors res;
for (int i = 0; i < _PY_MONITORING_LOCAL_EVENTS; i++) {
res.tools[i] = a.tools[i] & ~b.tools[i];
}
return res;
}
#ifndef NDEBUG
static inline _Py_LocalMonitors
monitors_and(_Py_LocalMonitors a, _Py_LocalMonitors b)
{
_Py_LocalMonitors res;
for (int i = 0; i < _PY_MONITORING_LOCAL_EVENTS; i++) {
res.tools[i] = a.tools[i] & b.tools[i];
}
return res;
}
#endif
/* The union of the *local* events in a and b.
* Global events like RAISE are ignored.
* Used for instrumentation, as only local
* events get instrumented.
*/
static inline _Py_LocalMonitors
local_union(_Py_GlobalMonitors a, _Py_LocalMonitors b)
{
_Py_LocalMonitors res;
for (int i = 0; i < _PY_MONITORING_LOCAL_EVENTS; i++) {
res.tools[i] = a.tools[i] | b.tools[i];
}
return res;
}
static inline bool
monitors_are_empty(_Py_LocalMonitors m)
{
for (int i = 0; i < _PY_MONITORING_LOCAL_EVENTS; i++) {
if (m.tools[i]) {
return false;
}
}
return true;
}
static inline bool
multiple_tools(_Py_LocalMonitors *m)
{
for (int i = 0; i < _PY_MONITORING_LOCAL_EVENTS; i++) {
if (_Py_popcount32(m->tools[i]) > 1) {
return true;
}
}
return false;
}
static inline _PyMonitoringEventSet
get_local_events(_Py_LocalMonitors *m, int tool_id)
{
_PyMonitoringEventSet result = 0;
for (int e = 0; e < _PY_MONITORING_LOCAL_EVENTS; e++) {
if ((m->tools[e] >> tool_id) & 1) {
result |= (1 << e);
}
}
return result;
}
static inline _PyMonitoringEventSet
get_events(_Py_GlobalMonitors *m, int tool_id)
{
_PyMonitoringEventSet result = 0;
for (int e = 0; e < _PY_MONITORING_UNGROUPED_EVENTS; e++) {
if ((m->tools[e] >> tool_id) & 1) {
result |= (1 << e);
}
}
return result;
}
/* Line delta.
* 8 bit value.
* if line_delta == -128:
* line = None # represented as -1
* elif line_delta == -127 or line_delta == -126:
* line = PyCode_Addr2Line(code, offset * sizeof(_Py_CODEUNIT));
* else:
* line = first_line + (offset >> OFFSET_SHIFT) + line_delta;
*/
#define NO_LINE -128
#define COMPUTED_LINE_LINENO_CHANGE -127
#define COMPUTED_LINE -126
#define OFFSET_SHIFT 4
static int8_t
compute_line_delta(PyCodeObject *code, int offset, int line)
{
if (line < 0) {
return NO_LINE;
}
int delta = line - code->co_firstlineno - (offset >> OFFSET_SHIFT);
if (delta <= INT8_MAX && delta > COMPUTED_LINE) {
return delta;
}
return COMPUTED_LINE;
}
static int
compute_line(PyCodeObject *code, int offset, int8_t line_delta)
{
if (line_delta > COMPUTED_LINE) {
return code->co_firstlineno + (offset >> OFFSET_SHIFT) + line_delta;
}
if (line_delta == NO_LINE) {
return -1;
}
assert(line_delta == COMPUTED_LINE || line_delta == COMPUTED_LINE_LINENO_CHANGE);
/* Look it up */
return PyCode_Addr2Line(code, offset * sizeof(_Py_CODEUNIT));
}
int
_PyInstruction_GetLength(PyCodeObject *code, int offset)
{
ASSERT_WORLD_STOPPED_OR_LOCKED(code);
int opcode = _PyCode_CODE(code)[offset].op.code;
assert(opcode != 0);
assert(opcode != RESERVED);
if (opcode == INSTRUMENTED_LINE) {
opcode = code->_co_monitoring->lines[offset].original_opcode;
}
if (opcode == INSTRUMENTED_INSTRUCTION) {
opcode = code->_co_monitoring->per_instruction_opcodes[offset];
}
int deinstrumented = DE_INSTRUMENT[opcode];
if (deinstrumented) {
opcode = deinstrumented;
}
else {
opcode = _PyOpcode_Deopt[opcode];
}
assert(opcode != 0);
if (opcode == ENTER_EXECUTOR) {
int exec_index = _PyCode_CODE(code)[offset].op.arg;
_PyExecutorObject *exec = code->co_executors->executors[exec_index];
opcode = _PyOpcode_Deopt[exec->vm_data.opcode];
}
assert(!is_instrumented(opcode));
assert(opcode != ENTER_EXECUTOR);
assert(opcode == _PyOpcode_Deopt[opcode]);
return 1 + _PyOpcode_Caches[opcode];
}
#ifdef INSTRUMENT_DEBUG
static void
dump_instrumentation_data_tools(PyCodeObject *code, uint8_t *tools, int i, FILE*out)
{
if (tools == NULL) {
fprintf(out, "tools = NULL");
}
else {
fprintf(out, "tools = %d", tools[i]);
}
}
static void
dump_instrumentation_data_lines(PyCodeObject *code, _PyCoLineInstrumentationData *lines, int i, FILE*out)
{
if (lines == NULL) {
fprintf(out, ", lines = NULL");
}
else if (lines[i].original_opcode == 0) {
fprintf(out, ", lines = {original_opcode = No LINE (0), line_delta = %d)", lines[i].line_delta);
}
else {
fprintf(out, ", lines = {original_opcode = %s, line_delta = %d)", _PyOpcode_OpName[lines[i].original_opcode], lines[i].line_delta);
}
}
static void
dump_instrumentation_data_line_tools(PyCodeObject *code, uint8_t *line_tools, int i, FILE*out)
{
if (line_tools == NULL) {
fprintf(out, ", line_tools = NULL");
}
else {
fprintf(out, ", line_tools = %d", line_tools[i]);
}
}
static void
dump_instrumentation_data_per_instruction(PyCodeObject *code, _PyCoMonitoringData *data, int i, FILE*out)
{
if (data->per_instruction_opcodes == NULL) {
fprintf(out, ", per-inst opcode = NULL");
}
else {
fprintf(out, ", per-inst opcode = %s", _PyOpcode_OpName[data->per_instruction_opcodes[i]]);
}
if (data->per_instruction_tools == NULL) {
fprintf(out, ", per-inst tools = NULL");
}
else {
fprintf(out, ", per-inst tools = %d", data->per_instruction_tools[i]);
}
}
static void
dump_global_monitors(const char *prefix, _Py_GlobalMonitors monitors, FILE*out)
{
fprintf(out, "%s monitors:\n", prefix);
for (int event = 0; event < _PY_MONITORING_UNGROUPED_EVENTS; event++) {
fprintf(out, " Event %d: Tools %x\n", event, monitors.tools[event]);
}
}
static void
dump_local_monitors(const char *prefix, _Py_LocalMonitors monitors, FILE*out)
{
fprintf(out, "%s monitors:\n", prefix);
for (int event = 0; event < _PY_MONITORING_LOCAL_EVENTS; event++) {
fprintf(out, " Event %d: Tools %x\n", event, monitors.tools[event]);
}
}
/* No error checking -- Don't use this for anything but experimental debugging */
static void
dump_instrumentation_data(PyCodeObject *code, int star, FILE*out)
{
_PyCoMonitoringData *data = code->_co_monitoring;
fprintf(out, "\n");
PyObject_Print(code->co_name, out, Py_PRINT_RAW);
fprintf(out, "\n");
if (data == NULL) {
fprintf(out, "NULL\n");
return;
}
dump_global_monitors("Global", _PyInterpreterState_GET()->monitors, out);
dump_local_monitors("Code", data->local_monitors, out);
dump_local_monitors("Active", data->active_monitors, out);
int code_len = (int)Py_SIZE(code);
bool starred = false;
for (int i = 0; i < code_len; i += _PyInstruction_GetLength(code, i)) {
_Py_CODEUNIT *instr = &_PyCode_CODE(code)[i];
int opcode = instr->op.code;
if (i == star) {
fprintf(out, "** ");
starred = true;
}
fprintf(out, "Offset: %d, line: %d %s: ", i, PyCode_Addr2Line(code, i*2), _PyOpcode_OpName[opcode]);
dump_instrumentation_data_tools(code, data->tools, i, out);
dump_instrumentation_data_lines(code, data->lines, i, out);
dump_instrumentation_data_line_tools(code, data->line_tools, i, out);
dump_instrumentation_data_per_instruction(code, data, i, out);
fprintf(out, "\n");
;
}
if (!starred && star >= 0) {
fprintf(out, "Error offset not at valid instruction offset: %d\n", star);
fprintf(out, " ");
dump_instrumentation_data_tools(code, data->tools, star, out);
dump_instrumentation_data_lines(code, data->lines, star, out);
dump_instrumentation_data_line_tools(code, data->line_tools, star, out);
dump_instrumentation_data_per_instruction(code, data, star, out);
fprintf(out, "\n");
}
}
#define CHECK(test) do { \
if (!(test)) { \
dump_instrumentation_data(code, i, stderr); \
} \
assert(test); \
} while (0)
static bool
valid_opcode(int opcode)
{
if (opcode == INSTRUMENTED_LINE) {
return true;
}
if (IS_VALID_OPCODE(opcode) &&
opcode != CACHE &&
opcode != RESERVED &&
opcode < 255)
{
return true;
}
return false;
}
static void
sanity_check_instrumentation(PyCodeObject *code)
{
ASSERT_WORLD_STOPPED_OR_LOCKED(code);
_PyCoMonitoringData *data = code->_co_monitoring;
if (data == NULL) {
return;
}
_Py_GlobalMonitors global_monitors = _PyInterpreterState_GET()->monitors;
_Py_LocalMonitors active_monitors;
if (code->_co_monitoring) {
_Py_LocalMonitors local_monitors = code->_co_monitoring->local_monitors;
active_monitors = local_union(global_monitors, local_monitors);
}
else {
_Py_LocalMonitors empty = (_Py_LocalMonitors) { 0 };
active_monitors = local_union(global_monitors, empty);
}
assert(monitors_equals(
code->_co_monitoring->active_monitors,
active_monitors));
int code_len = (int)Py_SIZE(code);
for (int i = 0; i < code_len;) {
_Py_CODEUNIT *instr = &_PyCode_CODE(code)[i];
int opcode = instr->op.code;
int base_opcode = _Py_GetBaseCodeUnit(code, offset).op.code;
CHECK(valid_opcode(opcode));
CHECK(valid_opcode(base_opcode));
if (opcode == INSTRUMENTED_INSTRUCTION) {
opcode = data->per_instruction_opcodes[i];
if (!is_instrumented(opcode)) {
CHECK(_PyOpcode_Deopt[opcode] == opcode);
}
}
if (opcode == INSTRUMENTED_LINE) {
CHECK(data->lines);
CHECK(valid_opcode(data->lines[i].original_opcode));
opcode = data->lines[i].original_opcode;
CHECK(opcode != END_FOR);
CHECK(opcode != RESUME);
CHECK(opcode != RESUME_CHECK);
CHECK(opcode != INSTRUMENTED_RESUME);
if (!is_instrumented(opcode)) {
CHECK(_PyOpcode_Deopt[opcode] == opcode);
}
CHECK(opcode != INSTRUMENTED_LINE);
}
else if (data->lines) {
/* If original_opcode is INSTRUMENTED_INSTRUCTION
* *and* we are executing a INSTRUMENTED_LINE instruction
* that has de-instrumented itself, then we will execute
* an invalid INSTRUMENTED_INSTRUCTION */
CHECK(data->lines[i].original_opcode != INSTRUMENTED_INSTRUCTION);
}
if (opcode == INSTRUMENTED_INSTRUCTION) {
CHECK(data->per_instruction_opcodes[i] != 0);
opcode = data->per_instruction_opcodes[i];
}
if (is_instrumented(opcode)) {
CHECK(DE_INSTRUMENT[opcode] == base_opcode);
int event = EVENT_FOR_OPCODE[DE_INSTRUMENT[opcode]];
if (event < 0) {
/* RESUME fixup */
event = instr->op.arg ? 1: 0;
}
CHECK(active_monitors.tools[event] != 0);
}
if (data->lines && base_opcode != END_FOR) {
int line1 = compute_line(code, i, data->lines[i].line_delta);
int line2 = PyCode_Addr2Line(code, i*sizeof(_Py_CODEUNIT));
CHECK(line1 == line2);
}
CHECK(valid_opcode(opcode));
if (data->tools) {
uint8_t local_tools = data->tools[i];
if (opcode_has_event(base_opcode)) {
int event = EVENT_FOR_OPCODE[base_opcode];
if (event == -1) {
/* RESUME fixup */
event = _PyCode_CODE(code)[i].op.arg;
}
CHECK((active_monitors.tools[event] & local_tools) == local_tools);
}
else {
CHECK(local_tools == 0xff);
}
}
i += _PyInstruction_GetLength(code, i);
assert(i <= code_len);
}
}
#else
#define CHECK(test) assert(test)
#endif
/* Get the underlying code unit, stripping instrumentation and ENTER_EXECUTOR */
_Py_CODEUNIT
_Py_GetBaseCodeUnit(PyCodeObject *code, int i)
{
_Py_CODEUNIT inst = _PyCode_CODE(code)[i];
int opcode = inst.op.code;
if (opcode < MIN_INSTRUMENTED_OPCODE) {
inst.op.code = _PyOpcode_Deopt[opcode];
assert(inst.op.code <= RESUME);
return inst;
}
if (opcode == ENTER_EXECUTOR) {
_PyExecutorObject *exec = code->co_executors->executors[inst.op.arg];
opcode = _PyOpcode_Deopt[exec->vm_data.opcode];
inst.op.code = opcode;
assert(opcode <= RESUME);
inst.op.arg = exec->vm_data.oparg;
assert(inst.op.code <= RESUME);
return inst;
}
if (opcode == INSTRUMENTED_LINE) {
opcode = code->_co_monitoring->lines[i].original_opcode;
}
if (opcode == INSTRUMENTED_INSTRUCTION) {
opcode = code->_co_monitoring->per_instruction_opcodes[i];
}
CHECK(opcode != INSTRUMENTED_INSTRUCTION);
CHECK(opcode != INSTRUMENTED_LINE);
int deinstrumented = DE_INSTRUMENT[opcode];
if (deinstrumented) {
inst.op.code = deinstrumented;
}
else {
inst.op.code = _PyOpcode_Deopt[opcode];
}
assert(inst.op.code < MIN_SPECIALIZED_OPCODE);
return inst;
}
static void
de_instrument(PyCodeObject *code, int i, int event)
{
assert(event != PY_MONITORING_EVENT_INSTRUCTION);
assert(event != PY_MONITORING_EVENT_LINE);
_Py_CODEUNIT *instr = &_PyCode_CODE(code)[i];
uint8_t *opcode_ptr = &instr->op.code;
int opcode = *opcode_ptr;
assert(opcode != ENTER_EXECUTOR);
if (opcode == INSTRUMENTED_LINE) {
opcode_ptr = &code->_co_monitoring->lines[i].original_opcode;
opcode = *opcode_ptr;
}
if (opcode == INSTRUMENTED_INSTRUCTION) {
opcode_ptr = &code->_co_monitoring->per_instruction_opcodes[i];
opcode = *opcode_ptr;
}
int deinstrumented = DE_INSTRUMENT[opcode];
if (deinstrumented == 0) {
return;
}
CHECK(_PyOpcode_Deopt[deinstrumented] == deinstrumented);
FT_ATOMIC_STORE_UINT8_RELAXED(*opcode_ptr, deinstrumented);
if (_PyOpcode_Caches[deinstrumented]) {
FT_ATOMIC_STORE_UINT16_RELAXED(instr[1].counter.as_counter,
adaptive_counter_warmup().as_counter);
}
}
static void
de_instrument_line(PyCodeObject *code, int i)
{
_Py_CODEUNIT *instr = &_PyCode_CODE(code)[i];
int opcode = instr->op.code;
if (opcode != INSTRUMENTED_LINE) {
return;
}
_PyCoLineInstrumentationData *lines = &code->_co_monitoring->lines[i];
int original_opcode = lines->original_opcode;
if (original_opcode == INSTRUMENTED_INSTRUCTION) {
lines->original_opcode = code->_co_monitoring->per_instruction_opcodes[i];
}
CHECK(original_opcode != 0);
CHECK(original_opcode == _PyOpcode_Deopt[original_opcode]);
instr->op.code = original_opcode;
if (_PyOpcode_Caches[original_opcode]) {
instr[1].counter = adaptive_counter_warmup();
}
assert(instr->op.code != INSTRUMENTED_LINE);
}
static void
de_instrument_per_instruction(PyCodeObject *code, int i)
{
_Py_CODEUNIT *instr = &_PyCode_CODE(code)[i];
uint8_t *opcode_ptr = &instr->op.code;
int opcode = *opcode_ptr;
if (opcode == INSTRUMENTED_LINE) {
opcode_ptr = &code->_co_monitoring->lines[i].original_opcode;
opcode = *opcode_ptr;
}
if (opcode != INSTRUMENTED_INSTRUCTION) {
return;
}
int original_opcode = code->_co_monitoring->per_instruction_opcodes[i];
CHECK(original_opcode != 0);
CHECK(original_opcode == _PyOpcode_Deopt[original_opcode]);
*opcode_ptr = original_opcode;
if (_PyOpcode_Caches[original_opcode]) {
instr[1].counter = adaptive_counter_warmup();
}
assert(*opcode_ptr != INSTRUMENTED_INSTRUCTION);
assert(instr->op.code != INSTRUMENTED_INSTRUCTION);
}
static void
instrument(PyCodeObject *code, int i)
{
_Py_CODEUNIT *instr = &_PyCode_CODE(code)[i];
uint8_t *opcode_ptr = &instr->op.code;
int opcode =*opcode_ptr;
if (opcode == INSTRUMENTED_LINE) {
_PyCoLineInstrumentationData *lines = &code->_co_monitoring->lines[i];
opcode_ptr = &lines->original_opcode;
opcode = *opcode_ptr;
}
if (opcode == INSTRUMENTED_INSTRUCTION) {
opcode_ptr = &code->_co_monitoring->per_instruction_opcodes[i];
opcode = *opcode_ptr;
CHECK(opcode != INSTRUMENTED_INSTRUCTION && opcode != INSTRUMENTED_LINE);
CHECK(opcode == _PyOpcode_Deopt[opcode]);
}
CHECK(opcode != 0);
if (!is_instrumented(opcode)) {
int deopt = _PyOpcode_Deopt[opcode];
int instrumented = INSTRUMENTED_OPCODES[deopt];
assert(instrumented);
FT_ATOMIC_STORE_UINT8_RELAXED(*opcode_ptr, instrumented);
if (_PyOpcode_Caches[deopt]) {
FT_ATOMIC_STORE_UINT16_RELAXED(instr[1].counter.as_counter,
adaptive_counter_warmup().as_counter);
instr[1].counter = adaptive_counter_warmup();
}
}
}
static void
instrument_line(PyCodeObject *code, int i)
{
uint8_t *opcode_ptr = &_PyCode_CODE(code)[i].op.code;
int opcode = *opcode_ptr;
if (opcode == INSTRUMENTED_LINE) {
return;
}
_PyCoLineInstrumentationData *lines = &code->_co_monitoring->lines[i];
lines->original_opcode = _PyOpcode_Deopt[opcode];
CHECK(lines->original_opcode > 0);
*opcode_ptr = INSTRUMENTED_LINE;
}
static void
instrument_per_instruction(PyCodeObject *code, int i)
{
_Py_CODEUNIT *instr = &_PyCode_CODE(code)[i];
uint8_t *opcode_ptr = &instr->op.code;
int opcode = *opcode_ptr;
if (opcode == INSTRUMENTED_LINE) {
_PyCoLineInstrumentationData *lines = &code->_co_monitoring->lines[i];
opcode_ptr = &lines->original_opcode;
opcode = *opcode_ptr;
}
if (opcode == INSTRUMENTED_INSTRUCTION) {
assert(code->_co_monitoring->per_instruction_opcodes[i] > 0);
return;
}
CHECK(opcode != 0);
if (is_instrumented(opcode)) {
code->_co_monitoring->per_instruction_opcodes[i] = opcode;
}
else {
assert(opcode != 0);
assert(_PyOpcode_Deopt[opcode] != 0);
assert(_PyOpcode_Deopt[opcode] != RESUME);
code->_co_monitoring->per_instruction_opcodes[i] = _PyOpcode_Deopt[opcode];
}
assert(code->_co_monitoring->per_instruction_opcodes[i] > 0);
*opcode_ptr = INSTRUMENTED_INSTRUCTION;
}
static void
remove_tools(PyCodeObject * code, int offset, int event, int tools)
{
ASSERT_WORLD_STOPPED_OR_LOCKED(code);
assert(event != PY_MONITORING_EVENT_LINE);
assert(event != PY_MONITORING_EVENT_INSTRUCTION);
assert(PY_MONITORING_IS_INSTRUMENTED_EVENT(event));
assert(opcode_has_event(_Py_GetBaseCodeUnit(code, offset).op.code));
_PyCoMonitoringData *monitoring = code->_co_monitoring;
if (monitoring && monitoring->tools) {
monitoring->tools[offset] &= ~tools;
if (monitoring->tools[offset] == 0) {
de_instrument(code, offset, event);
}
}
else {
/* Single tool */
uint8_t single_tool = code->_co_monitoring->active_monitors.tools[event];
assert(_Py_popcount32(single_tool) <= 1);
if (((single_tool & tools) == single_tool)) {
de_instrument(code, offset, event);
}
}
}
#ifndef NDEBUG
static bool
tools_is_subset_for_event(PyCodeObject * code, int event, int tools)
{
int global_tools = _PyInterpreterState_GET()->monitors.tools[event];
int local_tools = code->_co_monitoring->local_monitors.tools[event];
return tools == ((global_tools | local_tools) & tools);
}
#endif
static void
remove_line_tools(PyCodeObject * code, int offset, int tools)
{
ASSERT_WORLD_STOPPED_OR_LOCKED(code);
assert(code->_co_monitoring);
if (code->_co_monitoring->line_tools)
{
uint8_t *toolsptr = &code->_co_monitoring->line_tools[offset];
*toolsptr &= ~tools;
if (*toolsptr == 0 ) {
de_instrument_line(code, offset);
}
}
else {
/* Single tool */
uint8_t single_tool = code->_co_monitoring->active_monitors.tools[PY_MONITORING_EVENT_LINE];
assert(_Py_popcount32(single_tool) <= 1);
if (((single_tool & tools) == single_tool)) {
de_instrument_line(code, offset);
}
}
}
static void
add_tools(PyCodeObject * code, int offset, int event, int tools)
{
ASSERT_WORLD_STOPPED_OR_LOCKED(code);
assert(event != PY_MONITORING_EVENT_LINE);
assert(event != PY_MONITORING_EVENT_INSTRUCTION);
assert(PY_MONITORING_IS_INSTRUMENTED_EVENT(event));
assert(code->_co_monitoring);
if (code->_co_monitoring &&
code->_co_monitoring->tools
) {
code->_co_monitoring->tools[offset] |= tools;
}
else {
/* Single tool */
assert(_Py_popcount32(tools) == 1);
assert(tools_is_subset_for_event(code, event, tools));
}
instrument(code, offset);
}
static void
add_line_tools(PyCodeObject * code, int offset, int tools)
{
ASSERT_WORLD_STOPPED_OR_LOCKED(code);
assert(tools_is_subset_for_event(code, PY_MONITORING_EVENT_LINE, tools));
assert(code->_co_monitoring);
if (code->_co_monitoring->line_tools) {
code->_co_monitoring->line_tools[offset] |= tools;
}
else {
/* Single tool */
assert(_Py_popcount32(tools) == 1);
}
instrument_line(code, offset);
}
static void
add_per_instruction_tools(PyCodeObject * code, int offset, int tools)
{
ASSERT_WORLD_STOPPED_OR_LOCKED(code);
assert(tools_is_subset_for_event(code, PY_MONITORING_EVENT_INSTRUCTION, tools));
assert(code->_co_monitoring);
if (code->_co_monitoring->per_instruction_tools) {
code->_co_monitoring->per_instruction_tools[offset] |= tools;
}
else {
/* Single tool */
assert(_Py_popcount32(tools) == 1);
}
instrument_per_instruction(code, offset);
}
static void
remove_per_instruction_tools(PyCodeObject * code, int offset, int tools)
{
ASSERT_WORLD_STOPPED_OR_LOCKED(code);
assert(code->_co_monitoring);
if (code->_co_monitoring->per_instruction_tools) {
uint8_t *toolsptr = &code->_co_monitoring->per_instruction_tools[offset];
*toolsptr &= ~tools;
if (*toolsptr == 0) {
de_instrument_per_instruction(code, offset);
}
}
else {
/* Single tool */
uint8_t single_tool = code->_co_monitoring->active_monitors.tools[PY_MONITORING_EVENT_INSTRUCTION];
assert(_Py_popcount32(single_tool) <= 1);
if (((single_tool & tools) == single_tool)) {
de_instrument_per_instruction(code, offset);
}
}
}
/* Return 1 if DISABLE returned, -1 if error, 0 otherwise */
static int
call_one_instrument(
PyInterpreterState *interp, PyThreadState *tstate, PyObject **args,
size_t nargsf, int8_t tool, int event)
{
assert(0 <= tool && tool < 8);
assert(tstate->tracing == 0);
PyObject *instrument = interp->monitoring_callables[tool][event];
if (instrument == NULL) {
return 0;
}
int old_what = tstate->what_event;
tstate->what_event = event;
tstate->tracing++;
PyObject *res = _PyObject_VectorcallTstate(tstate, instrument, args, nargsf, NULL);
tstate->tracing--;
tstate->what_event = old_what;
if (res == NULL) {
return -1;
}
Py_DECREF(res);
return (res == &_PyInstrumentation_DISABLE);
}
static const int8_t MOST_SIGNIFICANT_BITS[16] = {
-1, 0, 1, 1,
2, 2, 2, 2,
3, 3, 3, 3,
3, 3, 3, 3,
};
/* We could use _Py_bit_length here, but that is designed for larger (32/64)
* bit ints, and can perform relatively poorly on platforms without the
* necessary intrinsics. */
static inline int most_significant_bit(uint8_t bits) {
assert(bits != 0);
if (bits > 15) {
return MOST_SIGNIFICANT_BITS[bits>>4]+4;
}
return MOST_SIGNIFICANT_BITS[bits];
}
static uint32_t
global_version(PyInterpreterState *interp)
{
uint32_t version = (uint32_t)_Py_atomic_load_uintptr_relaxed(
&interp->ceval.instrumentation_version);
#ifdef Py_DEBUG
PyThreadState *tstate = _PyThreadState_GET();
uint32_t thread_version =
(uint32_t)(_Py_atomic_load_uintptr_relaxed(&tstate->eval_breaker) &
~_PY_EVAL_EVENTS_MASK);
assert(thread_version == version);
#endif
return version;
}
/* Atomically set the given version in the given location, without touching
anything in _PY_EVAL_EVENTS_MASK. */
static void
set_version_raw(uintptr_t *ptr, uint32_t version)
{
uintptr_t old = _Py_atomic_load_uintptr_relaxed(ptr);
uintptr_t new;
do {
new = (old & _PY_EVAL_EVENTS_MASK) | version;
} while (!_Py_atomic_compare_exchange_uintptr(ptr, &old, new));
}
static void
set_global_version(PyThreadState *tstate, uint32_t version)
{
assert((version & _PY_EVAL_EVENTS_MASK) == 0);
PyInterpreterState *interp = tstate->interp;
set_version_raw(&interp->ceval.instrumentation_version, version);
#ifdef Py_GIL_DISABLED
// Set the version on all threads in free-threaded builds.
_PyRuntimeState *runtime = &_PyRuntime;
HEAD_LOCK(runtime);
for (tstate = interp->threads.head; tstate;
tstate = PyThreadState_Next(tstate)) {
set_version_raw(&tstate->eval_breaker, version);
};
HEAD_UNLOCK(runtime);
#else
// Normal builds take the current version from instrumentation_version when
// attaching a thread, so we only have to set the current thread's version.
set_version_raw(&tstate->eval_breaker, version);
#endif
}
static bool
is_version_up_to_date(PyCodeObject *code, PyInterpreterState *interp)
{
ASSERT_WORLD_STOPPED_OR_LOCKED(code);
return global_version(interp) == code->_co_instrumentation_version;
}
#ifndef NDEBUG
static bool
instrumentation_cross_checks(PyInterpreterState *interp, PyCodeObject *code)
{
ASSERT_WORLD_STOPPED_OR_LOCKED(code);
_Py_LocalMonitors expected = local_union(
interp->monitors,
code->_co_monitoring->local_monitors);
return monitors_equals(code->_co_monitoring->active_monitors, expected);
}
static int
debug_check_sanity(PyInterpreterState *interp, PyCodeObject *code)
{
int res;
LOCK_CODE(code);
res = is_version_up_to_date(code, interp) &&
instrumentation_cross_checks(interp, code);
UNLOCK_CODE();
return res;
}
#endif
static inline uint8_t
get_tools_for_instruction(PyCodeObject *code, PyInterpreterState *interp, int i, int event)
{
uint8_t tools;
assert(event != PY_MONITORING_EVENT_LINE);
assert(event != PY_MONITORING_EVENT_INSTRUCTION);
if (event >= _PY_MONITORING_UNGROUPED_EVENTS) {
assert(event == PY_MONITORING_EVENT_C_RAISE ||
event == PY_MONITORING_EVENT_C_RETURN);
event = PY_MONITORING_EVENT_CALL;
}
if (PY_MONITORING_IS_INSTRUMENTED_EVENT(event)) {
CHECK(debug_check_sanity(interp, code));
if (code->_co_monitoring->tools) {
tools = code->_co_monitoring->tools[i];
}
else {
tools = code->_co_monitoring->active_monitors.tools[event];
}
}
else {
tools = interp->monitors.tools[event];
}
return tools;
}
static const char *const event_names [] = {
[PY_MONITORING_EVENT_PY_START] = "PY_START",
[PY_MONITORING_EVENT_PY_RESUME] = "PY_RESUME",
[PY_MONITORING_EVENT_PY_RETURN] = "PY_RETURN",
[PY_MONITORING_EVENT_PY_YIELD] = "PY_YIELD",
[PY_MONITORING_EVENT_CALL] = "CALL",
[PY_MONITORING_EVENT_LINE] = "LINE",
[PY_MONITORING_EVENT_INSTRUCTION] = "INSTRUCTION",
[PY_MONITORING_EVENT_JUMP] = "JUMP",
[PY_MONITORING_EVENT_BRANCH] = "BRANCH",
[PY_MONITORING_EVENT_C_RETURN] = "C_RETURN",
[PY_MONITORING_EVENT_PY_THROW] = "PY_THROW",
[PY_MONITORING_EVENT_RAISE] = "RAISE",
[PY_MONITORING_EVENT_RERAISE] = "RERAISE",
[PY_MONITORING_EVENT_EXCEPTION_HANDLED] = "EXCEPTION_HANDLED",
[PY_MONITORING_EVENT_C_RAISE] = "C_RAISE",
[PY_MONITORING_EVENT_PY_UNWIND] = "PY_UNWIND",
[PY_MONITORING_EVENT_STOP_ITERATION] = "STOP_ITERATION",
};
static int
call_instrumentation_vector(
PyThreadState *tstate, int event,
_PyInterpreterFrame *frame, _Py_CODEUNIT *instr, Py_ssize_t nargs, PyObject *args[])
{
if (tstate->tracing) {
return 0;
}
assert(!_PyErr_Occurred(tstate));
assert(args[0] == NULL);
PyCodeObject *code = _PyFrame_GetCode(frame);
assert(args[1] == NULL);
args[1] = (PyObject *)code;
int offset = (int)(instr - _PyCode_CODE(code));
/* Offset visible to user should be the offset in bytes, as that is the
* convention for APIs involving code offsets. */
int bytes_offset = offset * (int)sizeof(_Py_CODEUNIT);
PyObject *offset_obj = PyLong_FromLong(bytes_offset);
if (offset_obj == NULL) {
return -1;
}
assert(args[2] == NULL);
args[2] = offset_obj;
PyInterpreterState *interp = tstate->interp;
uint8_t tools = get_tools_for_instruction(code, interp, offset, event);
size_t nargsf = (size_t) nargs | PY_VECTORCALL_ARGUMENTS_OFFSET;
PyObject **callargs = &args[1];
int err = 0;
while (tools) {
int tool = most_significant_bit(tools);
assert(tool >= 0 && tool < 8);
assert(tools & (1 << tool));
tools ^= (1 << tool);
int res = call_one_instrument(interp, tstate, callargs, nargsf, tool, event);
if (res == 0) {
/* Nothing to do */
}
else if (res < 0) {
/* error */
err = -1;
break;
}
else {
/* DISABLE */
if (!PY_MONITORING_IS_INSTRUMENTED_EVENT(event)) {
PyErr_Format(PyExc_ValueError,
"Cannot disable %s events. Callback removed.",
event_names[event]);
/* Clear tool to prevent infinite loop */
Py_CLEAR(interp->monitoring_callables[tool][event]);
err = -1;
break;
}
else {
LOCK_CODE(code);
remove_tools(code, offset, event, 1 << tool);
UNLOCK_CODE();
}
}
}
Py_DECREF(offset_obj);
return err;
}
int
_Py_call_instrumentation(
PyThreadState *tstate, int event,
_PyInterpreterFrame *frame, _Py_CODEUNIT *instr)
{
PyObject *args[3] = { NULL, NULL, NULL };
return call_instrumentation_vector(tstate, event, frame, instr, 2, args);
}
int
_Py_call_instrumentation_arg(
PyThreadState *tstate, int event,
_PyInterpreterFrame *frame, _Py_CODEUNIT *instr, PyObject *arg)
{
PyObject *args[4] = { NULL, NULL, NULL, arg };
return call_instrumentation_vector(tstate, event, frame, instr, 3, args);
}
int
_Py_call_instrumentation_2args(
PyThreadState *tstate, int event,
_PyInterpreterFrame *frame, _Py_CODEUNIT *instr, PyObject *arg0, PyObject *arg1)
{
PyObject *args[5] = { NULL, NULL, NULL, arg0, arg1 };
return call_instrumentation_vector(tstate, event, frame, instr, 4, args);
}
_Py_CODEUNIT *
_Py_call_instrumentation_jump(
PyThreadState *tstate, int event,
_PyInterpreterFrame *frame, _Py_CODEUNIT *instr, _Py_CODEUNIT *target)
{
assert(event == PY_MONITORING_EVENT_JUMP ||
event == PY_MONITORING_EVENT_BRANCH);
assert(frame->instr_ptr == instr);
PyCodeObject *code = _PyFrame_GetCode(frame);
int to = (int)(target - _PyCode_CODE(code));
PyObject *to_obj = PyLong_FromLong(to * (int)sizeof(_Py_CODEUNIT));
if (to_obj == NULL) {
return NULL;
}
PyObject *args[4] = { NULL, NULL, NULL, to_obj };
int err = call_instrumentation_vector(tstate, event, frame, instr, 3, args);
Py_DECREF(to_obj);
if (err) {
return NULL;
}
if (frame->instr_ptr != instr) {
/* The callback has caused a jump (by setting the line number) */
return frame->instr_ptr;
}
return target;
}
static void
call_instrumentation_vector_protected(
PyThreadState *tstate, int event,
_PyInterpreterFrame *frame, _Py_CODEUNIT *instr, Py_ssize_t nargs, PyObject *args[])
{
assert(_PyErr_Occurred(tstate));
PyObject *exc = _PyErr_GetRaisedException(tstate);
int err = call_instrumentation_vector(tstate, event, frame, instr, nargs, args);
if (err) {
Py_XDECREF(exc);
}
else {
_PyErr_SetRaisedException(tstate, exc);
}
assert(_PyErr_Occurred(tstate));
}
void
_Py_call_instrumentation_exc2(
PyThreadState *tstate, int event,
_PyInterpreterFrame *frame, _Py_CODEUNIT *instr, PyObject *arg0, PyObject *arg1)
{
assert(_PyErr_Occurred(tstate));
PyObject *args[5] = { NULL, NULL, NULL, arg0, arg1 };
call_instrumentation_vector_protected(tstate, event, frame, instr, 4, args);
}
int
_Py_Instrumentation_GetLine(PyCodeObject *code, int index)
{
_PyCoMonitoringData *monitoring = code->_co_monitoring;
assert(monitoring != NULL);
assert(monitoring->lines != NULL);
assert(index >= code->_co_firsttraceable);
assert(index < Py_SIZE(code));
_PyCoLineInstrumentationData *line_data = &monitoring->lines[index];
int8_t line_delta = line_data->line_delta;
int line = compute_line(code, index, line_delta);
return line;
}
int
_Py_call_instrumentation_line(PyThreadState *tstate, _PyInterpreterFrame* frame, _Py_CODEUNIT *instr, _Py_CODEUNIT *prev)
{
PyCodeObject *code = _PyFrame_GetCode(frame);
assert(tstate->tracing == 0);
assert(debug_check_sanity(tstate->interp, code));
int i = (int)(instr - _PyCode_CODE(code));
_PyCoMonitoringData *monitoring = code->_co_monitoring;
_PyCoLineInstrumentationData *line_data = &monitoring->lines[i];
PyInterpreterState *interp = tstate->interp;
int8_t line_delta = line_data->line_delta;
int line = 0;
if (line_delta == COMPUTED_LINE_LINENO_CHANGE) {
// We know the line number must have changed, don't need to calculate
// the line number for now because we might not need it.
line = -1;
} else {
line = compute_line(code, i, line_delta);
assert(line >= 0);
assert(prev != NULL);
int prev_index = (int)(prev - _PyCode_CODE(code));
int prev_line = _Py_Instrumentation_GetLine(code, prev_index);
if (prev_line == line) {
int prev_opcode = _PyCode_CODE(code)[prev_index].op.code;
/* RESUME and INSTRUMENTED_RESUME are needed for the operation of
* instrumentation, so must never be hidden by an INSTRUMENTED_LINE.
*/
if (prev_opcode != RESUME && prev_opcode != INSTRUMENTED_RESUME) {
goto done;
}
}
}
uint8_t tools = code->_co_monitoring->line_tools != NULL ?
code->_co_monitoring->line_tools[i] :
(interp->monitors.tools[PY_MONITORING_EVENT_LINE] |
code->_co_monitoring->local_monitors.tools[PY_MONITORING_EVENT_LINE]
);
/* Special case sys.settrace to avoid boxing the line number,
* only to immediately unbox it. */
if (tools & (1 << PY_MONITORING_SYS_TRACE_ID)) {
if (tstate->c_tracefunc != NULL) {
PyFrameObject *frame_obj = _PyFrame_GetFrameObject(frame);
if (frame_obj == NULL) {
return -1;
}
if (frame_obj->f_trace_lines) {
/* Need to set tracing and what_event as if using
* the instrumentation call. */
int old_what = tstate->what_event;
tstate->what_event = PY_MONITORING_EVENT_LINE;
tstate->tracing++;
/* Call c_tracefunc directly, having set the line number. */
Py_INCREF(frame_obj);
if (line == -1 && line_delta > COMPUTED_LINE) {
/* Only assign f_lineno if it's easy to calculate, otherwise
* do lazy calculation by setting the f_lineno to 0.
*/
line = compute_line(code, i, line_delta);
}
frame_obj->f_lineno = line;
int err = tstate->c_tracefunc(tstate->c_traceobj, frame_obj, PyTrace_LINE, Py_None);
frame_obj->f_lineno = 0;
tstate->tracing--;
tstate->what_event = old_what;
Py_DECREF(frame_obj);
if (err) {
return -1;
}
}
}
tools &= (255 - (1 << PY_MONITORING_SYS_TRACE_ID));
}
if (tools == 0) {
goto done;
}
if (line == -1) {
/* Need to calculate the line number now for monitoring events */
line = compute_line(code, i, line_delta);
}
PyObject *line_obj = PyLong_FromLong(line);
if (line_obj == NULL) {
return -1;
}
PyObject *args[3] = { NULL, (PyObject *)code, line_obj };
do {
int tool = most_significant_bit(tools);
assert(tool >= 0 && tool < PY_MONITORING_SYS_PROFILE_ID);
assert(tools & (1 << tool));
tools &= ~(1 << tool);
int res = call_one_instrument(interp, tstate, &args[1],
2 | PY_VECTORCALL_ARGUMENTS_OFFSET,
tool, PY_MONITORING_EVENT_LINE);
if (res == 0) {
/* Nothing to do */
}
else if (res < 0) {
/* error */
Py_DECREF(line_obj);
return -1;
}
else {
/* DISABLE */
LOCK_CODE(code);
remove_line_tools(code, i, 1 << tool);
UNLOCK_CODE();
}
} while (tools);
Py_DECREF(line_obj);
uint8_t original_opcode;
done:
original_opcode = line_data->original_opcode;
assert(original_opcode != 0);
assert(original_opcode != INSTRUMENTED_LINE);
assert(_PyOpcode_Deopt[original_opcode] == original_opcode);
return original_opcode;
}
int
_Py_call_instrumentation_instruction(PyThreadState *tstate, _PyInterpreterFrame* frame, _Py_CODEUNIT *instr)
{
PyCodeObject *code = _PyFrame_GetCode(frame);
int offset = (int)(instr - _PyCode_CODE(code));
_PyCoMonitoringData *instrumentation_data = code->_co_monitoring;
assert(instrumentation_data->per_instruction_opcodes);
int next_opcode = instrumentation_data->per_instruction_opcodes[offset];
if (tstate->tracing) {
return next_opcode;
}
assert(debug_check_sanity(tstate->interp, code));
PyInterpreterState *interp = tstate->interp;
uint8_t tools = instrumentation_data->per_instruction_tools != NULL ?
instrumentation_data->per_instruction_tools[offset] :
(interp->monitors.tools[PY_MONITORING_EVENT_INSTRUCTION] |
code->_co_monitoring->local_monitors.tools[PY_MONITORING_EVENT_INSTRUCTION]
);
int bytes_offset = offset * (int)sizeof(_Py_CODEUNIT);
PyObject *offset_obj = PyLong_FromLong(bytes_offset);
if (offset_obj == NULL) {
return -1;
}
PyObject *args[3] = { NULL, (PyObject *)code, offset_obj };
while (tools) {
int tool = most_significant_bit(tools);
assert(tool >= 0 && tool < 8);
assert(tools & (1 << tool));
tools &= ~(1 << tool);
int res = call_one_instrument(interp, tstate, &args[1],
2 | PY_VECTORCALL_ARGUMENTS_OFFSET,
tool, PY_MONITORING_EVENT_INSTRUCTION);
if (res == 0) {
/* Nothing to do */
}
else if (res < 0) {
/* error */
Py_DECREF(offset_obj);
return -1;
}
else {
/* DISABLE */
LOCK_CODE(code);
remove_per_instruction_tools(code, offset, 1 << tool);
UNLOCK_CODE();
}
}
Py_DECREF(offset_obj);
assert(next_opcode != 0);
return next_opcode;
}
PyObject *
_PyMonitoring_RegisterCallback(int tool_id, int event_id, PyObject *obj)
{
PyInterpreterState *is = _PyInterpreterState_GET();
assert(0 <= tool_id && tool_id < PY_MONITORING_TOOL_IDS);
assert(0 <= event_id && event_id < _PY_MONITORING_EVENTS);
PyObject *callback = _Py_atomic_exchange_ptr(&is->monitoring_callables[tool_id][event_id],
Py_XNewRef(obj));
return callback;
}
static void
initialize_tools(PyCodeObject *code)
{
ASSERT_WORLD_STOPPED_OR_LOCKED(code);
uint8_t* tools = code->_co_monitoring->tools;
assert(tools != NULL);
int code_len = (int)Py_SIZE(code);
for (int i = 0; i < code_len; i++) {
_Py_CODEUNIT *instr = &_PyCode_CODE(code)[i];
int opcode = instr->op.code;
assert(opcode != ENTER_EXECUTOR);
if (opcode == INSTRUMENTED_LINE) {
opcode = code->_co_monitoring->lines[i].original_opcode;
}
if (opcode == INSTRUMENTED_INSTRUCTION) {
opcode = code->_co_monitoring->per_instruction_opcodes[i];
}
bool instrumented = is_instrumented(opcode);
if (instrumented) {
opcode = DE_INSTRUMENT[opcode];
assert(opcode != 0);
}
opcode = _PyOpcode_Deopt[opcode];
if (opcode_has_event(opcode)) {
if (instrumented) {
int8_t event;
if (opcode == RESUME) {
event = instr->op.arg != 0;
}
else {
event = EVENT_FOR_OPCODE[opcode];
assert(event > 0);
}
assert(event >= 0);
assert(PY_MONITORING_IS_INSTRUMENTED_EVENT(event));
tools[i] = code->_co_monitoring->active_monitors.tools[event];
CHECK(tools[i] != 0);
}
else {
tools[i] = 0;
}
}
#ifdef Py_DEBUG
/* Initialize tools for invalid locations to all ones to try to catch errors */
else {
tools[i] = 0xff;
}
for (int j = 1; j <= _PyOpcode_Caches[opcode]; j++) {
tools[i+j] = 0xff;
}
#endif
i += _PyOpcode_Caches[opcode];
}
}
#define NO_LINE -128
static void
initialize_lines(PyCodeObject *code)
{
ASSERT_WORLD_STOPPED_OR_LOCKED(code);
_PyCoLineInstrumentationData *line_data = code->_co_monitoring->lines;
assert(line_data != NULL);
int code_len = (int)Py_SIZE(code);
PyCodeAddressRange range;
_PyCode_InitAddressRange(code, &range);
for (int i = 0; i < code->_co_firsttraceable && i < code_len; i++) {
line_data[i].original_opcode = 0;
line_data[i].line_delta = -127;
}
int current_line = -1;
for (int i = code->_co_firsttraceable; i < code_len; ) {
int opcode = _Py_GetBaseCodeUnit(code, i).op.code;
int line = _PyCode_CheckLineNumber(i*(int)sizeof(_Py_CODEUNIT), &range);
line_data[i].line_delta = compute_line_delta(code, i, line);
int length = _PyInstruction_GetLength(code, i);
switch (opcode) {
case END_ASYNC_FOR:
case END_FOR:
case END_SEND:
case RESUME:
/* END_FOR cannot start a line, as it is skipped by FOR_ITER
* END_SEND cannot start a line, as it is skipped by SEND
* RESUME must not be instrumented with INSTRUMENT_LINE */
line_data[i].original_opcode = 0;
break;
default:
/* Set original_opcode to the opcode iff the instruction
* starts a line, and thus should be instrumented.
* This saves having to perform this check every time the
* we turn instrumentation on or off, and serves as a sanity
* check when debugging.
*/
if (line != current_line && line >= 0) {
line_data[i].original_opcode = opcode;
if (line_data[i].line_delta == COMPUTED_LINE) {
/* Label this line as a line with a line number change
* which could help the monitoring callback to quickly
* identify the line number change.
*/
line_data[i].line_delta = COMPUTED_LINE_LINENO_CHANGE;
}
}
else {
line_data[i].original_opcode = 0;
}
current_line = line;
}
for (int j = 1; j < length; j++) {
line_data[i+j].original_opcode = 0;
line_data[i+j].line_delta = NO_LINE;
}
i += length;
}
for (int i = code->_co_firsttraceable; i < code_len; ) {
_Py_CODEUNIT inst =_Py_GetBaseCodeUnit(code, i);
int opcode = inst.op.code;
int oparg = 0;
while (opcode == EXTENDED_ARG) {
oparg = (oparg << 8) | inst.op.arg;
i++;
inst =_Py_GetBaseCodeUnit(code, i);
opcode = inst.op.code;
}
oparg = (oparg << 8) | inst.op.arg;
i += _PyInstruction_GetLength(code, i);
int target = -1;
switch (opcode) {
case POP_JUMP_IF_FALSE:
case POP_JUMP_IF_TRUE:
case POP_JUMP_IF_NONE:
case POP_JUMP_IF_NOT_NONE:
case JUMP_FORWARD:
{
target = i + oparg;
break;
}
case FOR_ITER:
case SEND:
{
/* Skip over END_FOR/END_SEND */
target = i + oparg + 1;
break;
}
case JUMP_BACKWARD:
case JUMP_BACKWARD_NO_INTERRUPT:
{
target = i - oparg;
break;
}
default:
continue;
}
assert(target >= 0);
if (line_data[target].line_delta != NO_LINE) {
line_data[target].original_opcode = _Py_GetBaseCodeUnit(code, target).op.code;
if (line_data[target].line_delta == COMPUTED_LINE_LINENO_CHANGE) {
// If the line is a jump target, we are not sure if the line
// number changes, so we set it to COMPUTED_LINE.
line_data[target].line_delta = COMPUTED_LINE;
}
}
}
/* Scan exception table */
unsigned char *start = (unsigned char *)PyBytes_AS_STRING(code->co_exceptiontable);
unsigned char *end = start + PyBytes_GET_SIZE(code->co_exceptiontable);
unsigned char *scan = start;
while (scan < end) {
int start_offset, size, handler;
scan = parse_varint(scan, &start_offset);
assert(start_offset >= 0 && start_offset < code_len);
scan = parse_varint(scan, &size);
assert(size >= 0 && start_offset+size <= code_len);
scan = parse_varint(scan, &handler);
assert(handler >= 0 && handler < code_len);
int depth_and_lasti;
scan = parse_varint(scan, &depth_and_lasti);
int original_opcode = _Py_GetBaseCodeUnit(code, handler).op.code;
/* Skip if not the start of a line.
* END_ASYNC_FOR is a bit special as it marks the end of
* an `async for` loop, which should not generate its own
* line event. */
if (line_data[handler].line_delta != NO_LINE &&
original_opcode != END_ASYNC_FOR) {
line_data[handler].original_opcode = original_opcode;
}
}
}
static void
initialize_line_tools(PyCodeObject *code, _Py_LocalMonitors *all_events)
{
ASSERT_WORLD_STOPPED_OR_LOCKED(code);
uint8_t *line_tools = code->_co_monitoring->line_tools;
assert(line_tools != NULL);
int code_len = (int)Py_SIZE(code);
for (int i = 0; i < code_len; i++) {
line_tools[i] = all_events->tools[PY_MONITORING_EVENT_LINE];
}
}
static int
allocate_instrumentation_data(PyCodeObject *code)
{
ASSERT_WORLD_STOPPED_OR_LOCKED(code);
if (code->_co_monitoring == NULL) {
code->_co_monitoring = PyMem_Malloc(sizeof(_PyCoMonitoringData));
if (code->_co_monitoring == NULL) {
PyErr_NoMemory();
return -1;
}
code->_co_monitoring->local_monitors = (_Py_LocalMonitors){ 0 };
code->_co_monitoring->active_monitors = (_Py_LocalMonitors){ 0 };
code->_co_monitoring->tools = NULL;
code->_co_monitoring->lines = NULL;
code->_co_monitoring->line_tools = NULL;
code->_co_monitoring->per_instruction_opcodes = NULL;
code->_co_monitoring->per_instruction_tools = NULL;
}
return 0;
}
static int
update_instrumentation_data(PyCodeObject *code, PyInterpreterState *interp)
{
ASSERT_WORLD_STOPPED_OR_LOCKED(code);
int code_len = (int)Py_SIZE(code);
if (allocate_instrumentation_data(code)) {
return -1;
}
_Py_LocalMonitors all_events = local_union(
interp->monitors,
code->_co_monitoring->local_monitors);
bool multitools = multiple_tools(&all_events);
if (code->_co_monitoring->tools == NULL && multitools) {
code->_co_monitoring->tools = PyMem_Malloc(code_len);
if (code->_co_monitoring->tools == NULL) {
PyErr_NoMemory();
return -1;
}
initialize_tools(code);
}
if (all_events.tools[PY_MONITORING_EVENT_LINE]) {
if (code->_co_monitoring->lines == NULL) {
code->_co_monitoring->lines = PyMem_Malloc(code_len * sizeof(_PyCoLineInstrumentationData));
if (code->_co_monitoring->lines == NULL) {
PyErr_NoMemory();
return -1;
}
initialize_lines(code);
}
if (multitools && code->_co_monitoring->line_tools == NULL) {
code->_co_monitoring->line_tools = PyMem_Malloc(code_len);
if (code->_co_monitoring->line_tools == NULL) {
PyErr_NoMemory();
return -1;
}
initialize_line_tools(code, &all_events);
}
}
if (all_events.tools[PY_MONITORING_EVENT_INSTRUCTION]) {
if (code->_co_monitoring->per_instruction_opcodes == NULL) {
code->_co_monitoring->per_instruction_opcodes = PyMem_Malloc(code_len * sizeof(_PyCoLineInstrumentationData));
if (code->_co_monitoring->per_instruction_opcodes == NULL) {
PyErr_NoMemory();
return -1;
}
// Initialize all of the instructions so if local events change while another thread is executing
// we know what the original opcode was.
for (int i = 0; i < code_len; i++) {
int opcode = _PyCode_CODE(code)[i].op.code;
code->_co_monitoring->per_instruction_opcodes[i] = _PyOpcode_Deopt[opcode];
}
}
if (multitools && code->_co_monitoring->per_instruction_tools == NULL) {
code->_co_monitoring->per_instruction_tools = PyMem_Malloc(code_len);
if (code->_co_monitoring->per_instruction_tools == NULL) {
PyErr_NoMemory();
return -1;
}
for (int i = 0; i < code_len; i++) {
code->_co_monitoring->per_instruction_tools[i] = 0;
}
}
}
return 0;
}
static int
force_instrument_lock_held(PyCodeObject *code, PyInterpreterState *interp)
{
ASSERT_WORLD_STOPPED_OR_LOCKED(code);
#ifdef _Py_TIER2
if (code->co_executors != NULL) {
_PyCode_Clear_Executors(code);
}
_Py_Executors_InvalidateDependency(interp, code, 1);
#endif
int code_len = (int)Py_SIZE(code);
/* Exit early to avoid creating instrumentation
* data for potential statically allocated code
* objects.
* See https://github.com/python/cpython/issues/108390 */
if (code->co_flags & CO_NO_MONITORING_EVENTS) {
return 0;
}
if (update_instrumentation_data(code, interp)) {
return -1;
}
_Py_LocalMonitors active_events = local_union(
interp->monitors,
code->_co_monitoring->local_monitors);
_Py_LocalMonitors new_events;
_Py_LocalMonitors removed_events;
bool restarted = interp->last_restart_version > code->_co_instrumentation_version;
if (restarted) {
removed_events = code->_co_monitoring->active_monitors;
new_events = active_events;
}
else {
removed_events = monitors_sub(code->_co_monitoring->active_monitors, active_events);
new_events = monitors_sub(active_events, code->_co_monitoring->active_monitors);
assert(monitors_are_empty(monitors_and(new_events, removed_events)));
}
code->_co_monitoring->active_monitors = active_events;
if (monitors_are_empty(new_events) && monitors_are_empty(removed_events)) {
goto done;
}
/* Insert instrumentation */
for (int i = code->_co_firsttraceable; i < code_len; i+= _PyInstruction_GetLength(code, i)) {
assert(_PyCode_CODE(code)[i].op.code != ENTER_EXECUTOR);
_Py_CODEUNIT instr = _Py_GetBaseCodeUnit(code, i);
CHECK(instr.op.code != 0);
int base_opcode = instr.op.code;
if (opcode_has_event(base_opcode)) {
int8_t event;
if (base_opcode == RESUME) {
event = instr.op.arg > 0;
}
else {
event = EVENT_FOR_OPCODE[base_opcode];
assert(event > 0);
}
uint8_t removed_tools = removed_events.tools[event];
if (removed_tools) {
remove_tools(code, i, event, removed_tools);
}
uint8_t new_tools = new_events.tools[event];
if (new_tools) {
add_tools(code, i, event, new_tools);
}
}
}
// GH-103845: We need to remove both the line and instruction instrumentation before
// adding new ones, otherwise we may remove the newly added instrumentation.
uint8_t removed_line_tools = removed_events.tools[PY_MONITORING_EVENT_LINE];
uint8_t removed_per_instruction_tools = removed_events.tools[PY_MONITORING_EVENT_INSTRUCTION];
if (removed_line_tools) {
_PyCoLineInstrumentationData *line_data = code->_co_monitoring->lines;
for (int i = code->_co_firsttraceable; i < code_len;) {
if (line_data[i].original_opcode) {
remove_line_tools(code, i, removed_line_tools);
}
i += _PyInstruction_GetLength(code, i);
}
}
if (removed_per_instruction_tools) {
for (int i = code->_co_firsttraceable; i < code_len;) {
int opcode = _Py_GetBaseCodeUnit(code, i).op.code;
if (opcode == RESUME || opcode == END_FOR) {
i += _PyInstruction_GetLength(code, i);
continue;
}
remove_per_instruction_tools(code, i, removed_per_instruction_tools);
i += _PyInstruction_GetLength(code, i);
}
}
#ifdef INSTRUMENT_DEBUG
sanity_check_instrumentation(code);
#endif
uint8_t new_line_tools = new_events.tools[PY_MONITORING_EVENT_LINE];
uint8_t new_per_instruction_tools = new_events.tools[PY_MONITORING_EVENT_INSTRUCTION];
if (new_line_tools) {
_PyCoLineInstrumentationData *line_data = code->_co_monitoring->lines;
for (int i = code->_co_firsttraceable; i < code_len;) {
if (line_data[i].original_opcode) {
add_line_tools(code, i, new_line_tools);
}
i += _PyInstruction_GetLength(code, i);
}
}
if (new_per_instruction_tools) {
for (int i = code->_co_firsttraceable; i < code_len;) {
int opcode = _Py_GetBaseCodeUnit(code, i).op.code;
if (opcode == RESUME || opcode == END_FOR) {
i += _PyInstruction_GetLength(code, i);
continue;
}
add_per_instruction_tools(code, i, new_per_instruction_tools);
i += _PyInstruction_GetLength(code, i);
}
}
done:
FT_ATOMIC_STORE_UINTPTR_RELEASE(code->_co_instrumentation_version,
global_version(interp));
#ifdef INSTRUMENT_DEBUG
sanity_check_instrumentation(code);
#endif
return 0;
}
static int
instrument_lock_held(PyCodeObject *code, PyInterpreterState *interp)
{
ASSERT_WORLD_STOPPED_OR_LOCKED(code);
if (is_version_up_to_date(code, interp)) {
assert(
interp->ceval.instrumentation_version == 0 ||
instrumentation_cross_checks(interp, code)
);
return 0;
}
return force_instrument_lock_held(code, interp);
}
int
_Py_Instrument(PyCodeObject *code, PyInterpreterState *interp)
{
int res;
LOCK_CODE(code);
res = instrument_lock_held(code, interp);
UNLOCK_CODE();
return res;
}
#define C_RETURN_EVENTS \
((1 << PY_MONITORING_EVENT_C_RETURN) | \
(1 << PY_MONITORING_EVENT_C_RAISE))
#define C_CALL_EVENTS \
(C_RETURN_EVENTS | (1 << PY_MONITORING_EVENT_CALL))
static int
instrument_all_executing_code_objects(PyInterpreterState *interp) {
ASSERT_WORLD_STOPPED();
_PyRuntimeState *runtime = &_PyRuntime;
HEAD_LOCK(runtime);
PyThreadState* ts = PyInterpreterState_ThreadHead(interp);
HEAD_UNLOCK(runtime);
while (ts) {
_PyInterpreterFrame *frame = ts->current_frame;
while (frame) {
if (frame->owner != FRAME_OWNED_BY_CSTACK) {
if (instrument_lock_held(_PyFrame_GetCode(frame), interp)) {
return -1;
}
}
frame = frame->previous;
}
HEAD_LOCK(runtime);
ts = PyThreadState_Next(ts);
HEAD_UNLOCK(runtime);
}
return 0;
}
static void
set_events(_Py_GlobalMonitors *m, int tool_id, _PyMonitoringEventSet events)
{
assert(0 <= tool_id && tool_id < PY_MONITORING_TOOL_IDS);
for (int e = 0; e < _PY_MONITORING_UNGROUPED_EVENTS; e++) {
uint8_t *tools = &m->tools[e];
int active = (events >> e) & 1;
*tools &= ~(1 << tool_id);
*tools |= (active << tool_id);
}
}
static void
set_local_events(_Py_LocalMonitors *m, int tool_id, _PyMonitoringEventSet events)
{
assert(0 <= tool_id && tool_id < PY_MONITORING_TOOL_IDS);
for (int e = 0; e < _PY_MONITORING_LOCAL_EVENTS; e++) {
uint8_t *tools = &m->tools[e];
int val = (events >> e) & 1;
*tools &= ~(1 << tool_id);
*tools |= (val << tool_id);
}
}
static int
check_tool(PyInterpreterState *interp, int tool_id)
{
if (tool_id < PY_MONITORING_SYS_PROFILE_ID &&
interp->monitoring_tool_names[tool_id] == NULL)
{
PyErr_Format(PyExc_ValueError, "tool %d is not in use", tool_id);
return -1;
}
return 0;
}
/* We share the eval-breaker with flags, so the monitoring
* version goes in the top 24 bits */
#define MONITORING_VERSION_INCREMENT (1 << _PY_EVAL_EVENTS_BITS)
int
_PyMonitoring_SetEvents(int tool_id, _PyMonitoringEventSet events)
{
assert(0 <= tool_id && tool_id < PY_MONITORING_TOOL_IDS);
PyThreadState *tstate = _PyThreadState_GET();
PyInterpreterState *interp = tstate->interp;
assert(events < (1 << _PY_MONITORING_UNGROUPED_EVENTS));
if (check_tool(interp, tool_id)) {
return -1;
}
int res;
_PyEval_StopTheWorld(interp);
uint32_t existing_events = get_events(&interp->monitors, tool_id);
if (existing_events == events) {
res = 0;
goto done;
}
set_events(&interp->monitors, tool_id, events);
uint32_t new_version = global_version(interp) + MONITORING_VERSION_INCREMENT;
if (new_version == 0) {
PyErr_Format(PyExc_OverflowError, "events set too many times");
res = -1;
goto done;
}
set_global_version(tstate, new_version);
#ifdef _Py_TIER2
_Py_Executors_InvalidateAll(interp, 1);
#endif
res = instrument_all_executing_code_objects(interp);
done:
_PyEval_StartTheWorld(interp);
return res;
}
int
_PyMonitoring_SetLocalEvents(PyCodeObject *code, int tool_id, _PyMonitoringEventSet events)
{
assert(0 <= tool_id && tool_id < PY_MONITORING_TOOL_IDS);
PyInterpreterState *interp = _PyInterpreterState_GET();
assert(events < (1 << _PY_MONITORING_LOCAL_EVENTS));
if (code->_co_firsttraceable >= Py_SIZE(code)) {
PyErr_Format(PyExc_SystemError, "cannot instrument shim code object '%U'", code->co_name);
return -1;
}
if (check_tool(interp, tool_id)) {
return -1;
}
int res;
_PyEval_StopTheWorld(interp);
if (allocate_instrumentation_data(code)) {
res = -1;
goto done;
}
_Py_LocalMonitors *local = &code->_co_monitoring->local_monitors;
uint32_t existing_events = get_local_events(local, tool_id);
if (existing_events == events) {
res = 0;
goto done;
}
set_local_events(local, tool_id, events);
res = force_instrument_lock_held(code, interp);
done:
_PyEval_StartTheWorld(interp);
return res;
}
int
_PyMonitoring_GetLocalEvents(PyCodeObject *code, int tool_id, _PyMonitoringEventSet *events)
{
assert(0 <= tool_id && tool_id < PY_MONITORING_TOOL_IDS);
PyInterpreterState *interp = _PyInterpreterState_GET();
if (check_tool(interp, tool_id)) {
return -1;
}
if (code->_co_monitoring == NULL) {
*events = 0;
return 0;
}
_Py_LocalMonitors *local = &code->_co_monitoring->local_monitors;
*events = get_local_events(local, tool_id);
return 0;
}
/*[clinic input]
module monitoring
[clinic start generated code]*/
/*[clinic end generated code: output=da39a3ee5e6b4b0d input=37257f5987a360cf]*/
/*[clinic end generated code]*/
#include "clinic/instrumentation.c.h"
static int
check_valid_tool(int tool_id)
{
if (tool_id < 0 || tool_id >= PY_MONITORING_SYS_PROFILE_ID) {
PyErr_Format(PyExc_ValueError, "invalid tool %d (must be between 0 and 5)", tool_id);
return -1;
}
return 0;
}
/*[clinic input]
monitoring.use_tool_id
tool_id: int
name: object
/
[clinic start generated code]*/
static PyObject *
monitoring_use_tool_id_impl(PyObject *module, int tool_id, PyObject *name)
/*[clinic end generated code: output=30d76dc92b7cd653 input=ebc453761c621be1]*/
{
if (check_valid_tool(tool_id)) {
return NULL;
}
if (!PyUnicode_Check(name)) {
PyErr_SetString(PyExc_ValueError, "tool name must be a str");
return NULL;
}
PyInterpreterState *interp = _PyInterpreterState_GET();
if (interp->monitoring_tool_names[tool_id] != NULL) {
PyErr_Format(PyExc_ValueError, "tool %d is already in use", tool_id);
return NULL;
}
interp->monitoring_tool_names[tool_id] = Py_NewRef(name);
Py_RETURN_NONE;
}
/*[clinic input]
monitoring.free_tool_id
tool_id: int
/
[clinic start generated code]*/
static PyObject *
monitoring_free_tool_id_impl(PyObject *module, int tool_id)
/*[clinic end generated code: output=86c2d2a1219a8591 input=a23fb6be3a8618e9]*/
{
if (check_valid_tool(tool_id)) {
return NULL;
}
PyInterpreterState *interp = _PyInterpreterState_GET();
Py_CLEAR(interp->monitoring_tool_names[tool_id]);
Py_RETURN_NONE;
}
/*[clinic input]
monitoring.get_tool
tool_id: int
/
[clinic start generated code]*/
static PyObject *
monitoring_get_tool_impl(PyObject *module, int tool_id)
/*[clinic end generated code: output=1c05a98b404a9a16 input=eeee9bebd0bcae9d]*/
/*[clinic end generated code]*/
{
if (check_valid_tool(tool_id)) {
return NULL;
}
PyInterpreterState *interp = _PyInterpreterState_GET();
PyObject *name = interp->monitoring_tool_names[tool_id];
if (name == NULL) {
Py_RETURN_NONE;
}
return Py_NewRef(name);
}
/*[clinic input]
monitoring.register_callback
tool_id: int
event: int
func: object
/
[clinic start generated code]*/
static PyObject *
monitoring_register_callback_impl(PyObject *module, int tool_id, int event,
PyObject *func)
/*[clinic end generated code: output=e64daa363004030c input=df6d70ea4cf81007]*/
{
if (check_valid_tool(tool_id)) {
return NULL;
}
if (_Py_popcount32(event) != 1) {
PyErr_SetString(PyExc_ValueError, "The callback can only be set for one event at a time");
return NULL;
}
int event_id = _Py_bit_length(event)-1;
if (event_id < 0 || event_id >= _PY_MONITORING_EVENTS) {
PyErr_Format(PyExc_ValueError, "invalid event %d", event);
return NULL;
}
if (PySys_Audit("sys.monitoring.register_callback", "O", func) < 0) {
return NULL;
}
if (func == Py_None) {
func = NULL;
}
func = _PyMonitoring_RegisterCallback(tool_id, event_id, func);
if (func == NULL) {
Py_RETURN_NONE;
}
return func;
}
/*[clinic input]
monitoring.get_events -> int
tool_id: int
/
[clinic start generated code]*/
static int
monitoring_get_events_impl(PyObject *module, int tool_id)
/*[clinic end generated code: output=4450cc13f826c8c0 input=a64b238f76c4b2f7]*/
{
if (check_valid_tool(tool_id)) {
return -1;
}
_Py_GlobalMonitors *m = &_PyInterpreterState_GET()->monitors;
_PyMonitoringEventSet event_set = get_events(m, tool_id);
return event_set;
}
/*[clinic input]
monitoring.set_events
tool_id: int
event_set: int
/
[clinic start generated code]*/
static PyObject *
monitoring_set_events_impl(PyObject *module, int tool_id, int event_set)
/*[clinic end generated code: output=1916c1e49cfb5bdb input=a77ba729a242142b]*/
{
if (check_valid_tool(tool_id)) {
return NULL;
}
if (event_set < 0 || event_set >= (1 << _PY_MONITORING_EVENTS)) {
PyErr_Format(PyExc_ValueError, "invalid event set 0x%x", event_set);
return NULL;
}
if ((event_set & C_RETURN_EVENTS) && (event_set & C_CALL_EVENTS) != C_CALL_EVENTS) {
PyErr_Format(PyExc_ValueError, "cannot set C_RETURN or C_RAISE events independently");
return NULL;
}
event_set &= ~C_RETURN_EVENTS;
if (_PyMonitoring_SetEvents(tool_id, event_set)) {
return NULL;
}
Py_RETURN_NONE;
}
/*[clinic input]
monitoring.get_local_events -> int
tool_id: int
code: object
/
[clinic start generated code]*/
static int
monitoring_get_local_events_impl(PyObject *module, int tool_id,
PyObject *code)
/*[clinic end generated code: output=d3e92c1c9c1de8f9 input=bb0f927530386a94]*/
{
if (!PyCode_Check(code)) {
PyErr_Format(
PyExc_TypeError,
"code must be a code object"
);
return -1;
}
if (check_valid_tool(tool_id)) {
return -1;
}
_PyMonitoringEventSet event_set = 0;
_PyCoMonitoringData *data = ((PyCodeObject *)code)->_co_monitoring;
if (data != NULL) {
for (int e = 0; e < _PY_MONITORING_LOCAL_EVENTS; e++) {
if ((data->local_monitors.tools[e] >> tool_id) & 1) {
event_set |= (1 << e);
}
}
}
return event_set;
}
/*[clinic input]
monitoring.set_local_events
tool_id: int
code: object
event_set: int
/
[clinic start generated code]*/
static PyObject *
monitoring_set_local_events_impl(PyObject *module, int tool_id,
PyObject *code, int event_set)
/*[clinic end generated code: output=68cc755a65dfea99 input=5655ecd78d937a29]*/
{
if (!PyCode_Check(code)) {
PyErr_Format(
PyExc_TypeError,
"code must be a code object"
);
return NULL;
}
if (check_valid_tool(tool_id)) {
return NULL;
}
if ((event_set & C_RETURN_EVENTS) && (event_set & C_CALL_EVENTS) != C_CALL_EVENTS) {
PyErr_Format(PyExc_ValueError, "cannot set C_RETURN or C_RAISE events independently");
return NULL;
}
event_set &= ~C_RETURN_EVENTS;
if (event_set < 0 || event_set >= (1 << _PY_MONITORING_LOCAL_EVENTS)) {
PyErr_Format(PyExc_ValueError, "invalid local event set 0x%x", event_set);
return NULL;
}
if (_PyMonitoring_SetLocalEvents((PyCodeObject*)code, tool_id, event_set)) {
return NULL;
}
Py_RETURN_NONE;
}
/*[clinic input]
monitoring.restart_events
[clinic start generated code]*/
static PyObject *
monitoring_restart_events_impl(PyObject *module)
/*[clinic end generated code: output=e025dd5ba33314c4 input=add8a855063c8008]*/
{
/* We want to ensure that:
* last restart version > instrumented version for all code objects
* last restart version < current version
*/
PyThreadState *tstate = _PyThreadState_GET();
PyInterpreterState *interp = tstate->interp;
_PyEval_StopTheWorld(interp);
uint32_t restart_version = global_version(interp) + MONITORING_VERSION_INCREMENT;
uint32_t new_version = restart_version + MONITORING_VERSION_INCREMENT;
if (new_version <= MONITORING_VERSION_INCREMENT) {
_PyEval_StartTheWorld(interp);
PyErr_Format(PyExc_OverflowError, "events set too many times");
return NULL;
}
interp->last_restart_version = restart_version;
set_global_version(tstate, new_version);
int res = instrument_all_executing_code_objects(interp);
_PyEval_StartTheWorld(interp);
if (res) {
return NULL;
}
Py_RETURN_NONE;
}
static int
add_power2_constant(PyObject *obj, const char *name, int i)
{
PyObject *val = PyLong_FromLong(1<<i);
if (val == NULL) {
return -1;
}
int err = PyObject_SetAttrString(obj, name, val);
Py_DECREF(val);
return err;
}
/*[clinic input]
monitoring._all_events
[clinic start generated code]*/
static PyObject *
monitoring__all_events_impl(PyObject *module)
/*[clinic end generated code: output=6b7581e2dbb690f6 input=62ee9672c17b7f0e]*/
{
PyInterpreterState *interp = _PyInterpreterState_GET();
PyObject *res = PyDict_New();
if (res == NULL) {
return NULL;
}
for (int e = 0; e < _PY_MONITORING_UNGROUPED_EVENTS; e++) {
uint8_t tools = interp->monitors.tools[e];
if (tools == 0) {
continue;
}
PyObject *tools_obj = PyLong_FromLong(tools);
assert(tools_obj != NULL);
int err = PyDict_SetItemString(res, event_names[e], tools_obj);
Py_DECREF(tools_obj);
if (err < 0) {
Py_DECREF(res);
return NULL;
}
}
return res;
}
static PyMethodDef methods[] = {
MONITORING_USE_TOOL_ID_METHODDEF
MONITORING_FREE_TOOL_ID_METHODDEF
MONITORING_GET_TOOL_METHODDEF
MONITORING_REGISTER_CALLBACK_METHODDEF
MONITORING_GET_EVENTS_METHODDEF
MONITORING_SET_EVENTS_METHODDEF
MONITORING_GET_LOCAL_EVENTS_METHODDEF
MONITORING_SET_LOCAL_EVENTS_METHODDEF
MONITORING_RESTART_EVENTS_METHODDEF
MONITORING__ALL_EVENTS_METHODDEF
{NULL, NULL} // sentinel
};
static struct PyModuleDef monitoring_module = {
PyModuleDef_HEAD_INIT,
.m_name = "sys.monitoring",
.m_size = -1, /* multiple "initialization" just copies the module dict. */
.m_methods = methods,
};
PyObject *_Py_CreateMonitoringObject(void)
{
PyObject *mod = _PyModule_CreateInitialized(&monitoring_module, PYTHON_API_VERSION);
if (mod == NULL) {
return NULL;
}
if (PyObject_SetAttrString(mod, "DISABLE", &_PyInstrumentation_DISABLE)) {
goto error;
}
if (PyObject_SetAttrString(mod, "MISSING", &_PyInstrumentation_MISSING)) {
goto error;
}
PyObject *events = _PyNamespace_New(NULL);
if (events == NULL) {
goto error;
}
int err = PyObject_SetAttrString(mod, "events", events);
Py_DECREF(events);
if (err) {
goto error;
}
for (int i = 0; i < _PY_MONITORING_EVENTS; i++) {
if (add_power2_constant(events, event_names[i], i)) {
goto error;
}
}
err = PyObject_SetAttrString(events, "NO_EVENTS", _PyLong_GetZero());
if (err) goto error;
PyObject *val = PyLong_FromLong(PY_MONITORING_DEBUGGER_ID);
err = PyObject_SetAttrString(mod, "DEBUGGER_ID", val);
Py_DECREF(val);
if (err) goto error;
val = PyLong_FromLong(PY_MONITORING_COVERAGE_ID);
err = PyObject_SetAttrString(mod, "COVERAGE_ID", val);
Py_DECREF(val);
if (err) goto error;
val = PyLong_FromLong(PY_MONITORING_PROFILER_ID);
err = PyObject_SetAttrString(mod, "PROFILER_ID", val);
Py_DECREF(val);
if (err) goto error;
val = PyLong_FromLong(PY_MONITORING_OPTIMIZER_ID);
err = PyObject_SetAttrString(mod, "OPTIMIZER_ID", val);
Py_DECREF(val);
if (err) goto error;
return mod;
error:
Py_DECREF(mod);
return NULL;
}
static int
capi_call_instrumentation(PyMonitoringState *state, PyObject *codelike, int32_t offset,
PyObject **args, Py_ssize_t nargs, int event)
{
PyThreadState *tstate = _PyThreadState_GET();
PyInterpreterState *interp = tstate->interp;
uint8_t tools = state->active;
assert(args[1] == NULL);
args[1] = codelike;
if (offset < 0) {
PyErr_SetString(PyExc_ValueError, "offset must be non-negative");
return -1;
}
if (event != PY_MONITORING_EVENT_LINE) {
PyObject *offset_obj = PyLong_FromLong(offset);
if (offset_obj == NULL) {
return -1;
}
assert(args[2] == NULL);
args[2] = offset_obj;
}
size_t nargsf = (size_t) nargs | PY_VECTORCALL_ARGUMENTS_OFFSET;
PyObject **callargs = &args[1];
int err = 0;
while (tools) {
int tool = most_significant_bit(tools);
assert(tool >= 0 && tool < 8);
assert(tools & (1 << tool));
tools ^= (1 << tool);
int res = call_one_instrument(interp, tstate, callargs, nargsf, tool, event);
if (res == 0) {
/* Nothing to do */
}
else if (res < 0) {
/* error */
err = -1;
break;
}
else {
/* DISABLE */
if (!PY_MONITORING_IS_INSTRUMENTED_EVENT(event)) {
PyErr_Format(PyExc_ValueError,
"Cannot disable %s events. Callback removed.",
event_names[event]);
/* Clear tool to prevent infinite loop */
Py_CLEAR(interp->monitoring_callables[tool][event]);
err = -1;
break;
}
else {
state->active &= ~(1 << tool);
}
}
}
return err;
}
int
PyMonitoring_EnterScope(PyMonitoringState *state_array, uint64_t *version,
const uint8_t *event_types, Py_ssize_t length)
{
PyInterpreterState *interp = _PyInterpreterState_GET();
if (global_version(interp) == *version) {
return 0;
}
_Py_GlobalMonitors *m = &interp->monitors;
for (Py_ssize_t i = 0; i < length; i++) {
int event = event_types[i];
state_array[i].active = m->tools[event];
}
*version = global_version(interp);
return 0;
}
int
PyMonitoring_ExitScope(void)
{
return 0;
}
int
_PyMonitoring_FirePyStartEvent(PyMonitoringState *state, PyObject *codelike, int32_t offset)
{
assert(state->active);
PyObject *args[3] = { NULL, NULL, NULL };
return capi_call_instrumentation(state, codelike, offset, args, 2,
PY_MONITORING_EVENT_PY_START);
}
int
_PyMonitoring_FirePyResumeEvent(PyMonitoringState *state, PyObject *codelike, int32_t offset)
{
assert(state->active);
PyObject *args[3] = { NULL, NULL, NULL };
return capi_call_instrumentation(state, codelike, offset, args, 2,
PY_MONITORING_EVENT_PY_RESUME);
}
int
_PyMonitoring_FirePyReturnEvent(PyMonitoringState *state, PyObject *codelike, int32_t offset,
PyObject* retval)
{
assert(state->active);
PyObject *args[4] = { NULL, NULL, NULL, retval };
return capi_call_instrumentation(state, codelike, offset, args, 3,
PY_MONITORING_EVENT_PY_RETURN);
}
int
_PyMonitoring_FirePyYieldEvent(PyMonitoringState *state, PyObject *codelike, int32_t offset,
PyObject* retval)
{
assert(state->active);
PyObject *args[4] = { NULL, NULL, NULL, retval };
return capi_call_instrumentation(state, codelike, offset, args, 3,
PY_MONITORING_EVENT_PY_YIELD);
}
int
_PyMonitoring_FireCallEvent(PyMonitoringState *state, PyObject *codelike, int32_t offset,
PyObject* callable, PyObject *arg0)
{
assert(state->active);
PyObject *args[5] = { NULL, NULL, NULL, callable, arg0 };
return capi_call_instrumentation(state, codelike, offset, args, 4,
PY_MONITORING_EVENT_CALL);
}
int
_PyMonitoring_FireLineEvent(PyMonitoringState *state, PyObject *codelike, int32_t offset,
int lineno)
{
assert(state->active);
PyObject *lno = PyLong_FromLong(lineno);
if (lno == NULL) {
return -1;
}
PyObject *args[3] = { NULL, NULL, lno };
int res= capi_call_instrumentation(state, codelike, offset, args, 2,
PY_MONITORING_EVENT_LINE);
Py_DECREF(lno);
return res;
}
int
_PyMonitoring_FireJumpEvent(PyMonitoringState *state, PyObject *codelike, int32_t offset,
PyObject *target_offset)
{
assert(state->active);
PyObject *args[4] = { NULL, NULL, NULL, target_offset };
return capi_call_instrumentation(state, codelike, offset, args, 3,
PY_MONITORING_EVENT_JUMP);
}
int
_PyMonitoring_FireBranchEvent(PyMonitoringState *state, PyObject *codelike, int32_t offset,
PyObject *target_offset)
{
assert(state->active);
PyObject *args[4] = { NULL, NULL, NULL, target_offset };
return capi_call_instrumentation(state, codelike, offset, args, 3,
PY_MONITORING_EVENT_BRANCH);
}
int
_PyMonitoring_FireCReturnEvent(PyMonitoringState *state, PyObject *codelike, int32_t offset,
PyObject *retval)
{
assert(state->active);
PyObject *args[4] = { NULL, NULL, NULL, retval };
return capi_call_instrumentation(state, codelike, offset, args, 3,
PY_MONITORING_EVENT_C_RETURN);
}
static inline int
exception_event_setup(PyObject **exc, int event) {
*exc = PyErr_GetRaisedException();
if (*exc == NULL) {
PyErr_Format(PyExc_ValueError,
"Firing event %d with no exception set",
event);
return -1;
}
return 0;
}
static inline int
exception_event_teardown(int err, PyObject *exc) {
if (err == 0) {
PyErr_SetRaisedException(exc);
}
else {
assert(PyErr_Occurred());
Py_XDECREF(exc);
}
return err;
}
int
_PyMonitoring_FirePyThrowEvent(PyMonitoringState *state, PyObject *codelike, int32_t offset)
{
int event = PY_MONITORING_EVENT_PY_THROW;
assert(state->active);
PyObject *exc;
if (exception_event_setup(&exc, event) < 0) {
return -1;
}
PyObject *args[4] = { NULL, NULL, NULL, exc };
int err = capi_call_instrumentation(state, codelike, offset, args, 3, event);
return exception_event_teardown(err, exc);
}
int
_PyMonitoring_FireRaiseEvent(PyMonitoringState *state, PyObject *codelike, int32_t offset)
{
int event = PY_MONITORING_EVENT_RAISE;
assert(state->active);
PyObject *exc;
if (exception_event_setup(&exc, event) < 0) {
return -1;
}
PyObject *args[4] = { NULL, NULL, NULL, exc };
int err = capi_call_instrumentation(state, codelike, offset, args, 3, event);
return exception_event_teardown(err, exc);
}
int
_PyMonitoring_FireCRaiseEvent(PyMonitoringState *state, PyObject *codelike, int32_t offset)
{
int event = PY_MONITORING_EVENT_C_RAISE;
assert(state->active);
PyObject *exc;
if (exception_event_setup(&exc, event) < 0) {
return -1;
}
PyObject *args[4] = { NULL, NULL, NULL, exc };
int err = capi_call_instrumentation(state, codelike, offset, args, 3, event);
return exception_event_teardown(err, exc);
}
int
_PyMonitoring_FireReraiseEvent(PyMonitoringState *state, PyObject *codelike, int32_t offset)
{
int event = PY_MONITORING_EVENT_RERAISE;
assert(state->active);
PyObject *exc;
if (exception_event_setup(&exc, event) < 0) {
return -1;
}
PyObject *args[4] = { NULL, NULL, NULL, exc };
int err = capi_call_instrumentation(state, codelike, offset, args, 3, event);
return exception_event_teardown(err, exc);
}
int
_PyMonitoring_FireExceptionHandledEvent(PyMonitoringState *state, PyObject *codelike, int32_t offset)
{
int event = PY_MONITORING_EVENT_EXCEPTION_HANDLED;
assert(state->active);
PyObject *exc;
if (exception_event_setup(&exc, event) < 0) {
return -1;
}
PyObject *args[4] = { NULL, NULL, NULL, exc };
int err = capi_call_instrumentation(state, codelike, offset, args, 3, event);
return exception_event_teardown(err, exc);
}
int
_PyMonitoring_FirePyUnwindEvent(PyMonitoringState *state, PyObject *codelike, int32_t offset)
{
int event = PY_MONITORING_EVENT_PY_UNWIND;
assert(state->active);
PyObject *exc;
if (exception_event_setup(&exc, event) < 0) {
return -1;
}
PyObject *args[4] = { NULL, NULL, NULL, exc };
int err = capi_call_instrumentation(state, codelike, offset, args, 3, event);
return exception_event_teardown(err, exc);
}
int
_PyMonitoring_FireStopIterationEvent(PyMonitoringState *state, PyObject *codelike, int32_t offset, PyObject *value)
{
int event = PY_MONITORING_EVENT_STOP_ITERATION;
assert(state->active);
assert(!PyErr_Occurred());
PyErr_SetObject(PyExc_StopIteration, value);
PyObject *exc;
if (exception_event_setup(&exc, event) < 0) {
return -1;
}
PyObject *args[4] = { NULL, NULL, NULL, exc };
int err = capi_call_instrumentation(state, codelike, offset, args, 3, event);
Py_DECREF(exc);
return exception_event_teardown(err, NULL);
}
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