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GH-119866: Spill the stack around escaping calls. (GH-124392)

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* Spill the evaluation around escaping calls in the generated interpreter and JIT. 

* The code generator tracks live, cached values so they can be saved to memory when needed.

* Spills the stack pointer around escaping calls, so that the exact stack is visible to the cycle GC.
This commit is contained in:
Mark Shannon 2024-10-07 14:56:39 +01:00 • committed by GitHub
parent cda3b5a576
commit da071fa3e8
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GPG key ID: B5690EEEBB952194
25 changed files with 3841 additions and 2034 deletions
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20
Python/optimizer_bytecodes.c
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@ -182,7 +182,9 @@ dummy_func(void) {
res = sym_new_type(ctx, &PyFloat_Type);
}
}
res = sym_new_unknown(ctx);
else {
res = sym_new_unknown(ctx);
}
}
op(_BINARY_OP_ADD_INT, (left, right -- res)) {
@ -448,8 +450,10 @@ dummy_func(void) {
top = bottom;
}
op(_SWAP, (bottom, unused[oparg-2], top --
top, unused[oparg-2], bottom)) {
op(_SWAP, (bottom_in, unused[oparg-2], top_in --
top_out, unused[oparg-2], bottom_out)) {
bottom_out = bottom_in;
top_out = top_in;
}
op(_LOAD_ATTR_INSTANCE_VALUE, (offset/1, owner -- attr, null if (oparg & 1))) {
@ -479,9 +483,7 @@ dummy_func(void) {
op(_LOAD_ATTR, (owner -- attr, self_or_null if (oparg & 1))) {
(void)owner;
attr = sym_new_not_null(ctx);
if (oparg & 1) {
self_or_null = sym_new_unknown(ctx);
}
self_or_null = sym_new_unknown(ctx);
}
op(_LOAD_ATTR_MODULE, (index/1, owner -- attr, null if (oparg & 1))) {
@ -570,7 +572,6 @@ dummy_func(void) {
op(_INIT_CALL_PY_EXACT_ARGS, (callable, self_or_null, args[oparg] -- new_frame: _Py_UOpsAbstractFrame *)) {
int argcount = oparg;
(void)callable;
PyCodeObject *co = NULL;
@ -647,11 +648,10 @@ dummy_func(void) {
}
op(_RETURN_VALUE, (retval -- res)) {
SYNC_SP();
SAVE_STACK();
ctx->frame->stack_pointer = stack_pointer;
frame_pop(ctx);
stack_pointer = ctx->frame->stack_pointer;
res = retval;
/* Stack space handling */
assert(corresponding_check_stack == NULL);
@ -666,6 +666,8 @@ dummy_func(void) {
// might be impossible, but bailing is still safe
ctx->done = true;
}
RELOAD_STACK();
res = retval;
}
op(_RETURN_GENERATOR, ( -- res)) {