Stowage/cpython
2
0
Fork 0
mirror of https://github.com/python/cpython.git synced 2025-12-08 06:10:17 +00:00
Code Issues Projects Releases Packages Wiki Activity

GH-141794: Limit size of generated machine code. (GH-142228)

Browse source 
* Factor out bodies of the largest uops, to reduce jit code size.
* Factor out common assert, also reducing jit code size.
* Limit size of jitted code for a single executor to 1MB.
This commit is contained in:
Mark Shannon 2025-12-03 17:43:35 +00:00 • committed by GitHub
parent aea5531583
commit 62423c9c36
No known key found for this signature in database
GPG key ID: B5690EEEBB952194
14 changed files with 1406 additions and 1731 deletions
Download patch file Download diff file Expand all files Collapse all files

30
Python/optimizer_analysis.c
View file

@ -278,6 +278,36 @@ get_co_name(JitOptContext *ctx, int index)
return PyTuple_GET_ITEM(get_current_code_object(ctx)->co_names, index);
}
#ifdef Py_DEBUG
void
_Py_opt_assert_within_stack_bounds(
_Py_UOpsAbstractFrame *frame, JitOptRef *stack_pointer,
const char *filename, int lineno
) {
if (frame->code == ((PyCodeObject *)&_Py_InitCleanup)) {
return;
}
int level = (int)(stack_pointer - frame->stack);
if (level < 0) {
printf("Stack underflow (depth = %d) at %s:%d\n", level, filename, lineno);
fflush(stdout);
abort();
}
int size = (int)(frame->stack_len);
if (level > size) {
printf("Stack overflow (depth = %d) at %s:%d\n", level, filename, lineno);
fflush(stdout);
abort();
}
}
#endif
#ifdef Py_DEBUG
#define ASSERT_WITHIN_STACK_BOUNDS(F, L) _Py_opt_assert_within_stack_bounds(ctx->frame, stack_pointer, (F), (L))
#else
#define ASSERT_WITHIN_STACK_BOUNDS(F, L) (void)0
#endif
// TODO (gh-134584) generate most of this table automatically
const uint16_t op_without_decref_inputs[MAX_UOP_ID + 1] = {
[_BINARY_OP_MULTIPLY_FLOAT] = _BINARY_OP_MULTIPLY_FLOAT__NO_DECREF_INPUTS,