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1455 lines
61 KiB
1455 lines
61 KiB
/*
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* This file is part of the Micro Python project, http://micropython.org/
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*
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* The MIT License (MIT)
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*
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* Copyright (c) 2013, 2014 Damien P. George
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* Copyright (c) 2014 Paul Sokolovsky
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include <stdio.h>
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#include <string.h>
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#include <assert.h>
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#include "py/mpstate.h"
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#include "py/nlr.h"
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#include "py/emitglue.h"
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#include "py/objtype.h"
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#include "py/runtime.h"
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#include "py/bc0.h"
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#include "py/bc.h"
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#if 0
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#define TRACE(ip) printf("sp=%d ", (int)(sp - &code_state->state[0] + 1)); mp_bytecode_print2(ip, 1, code_state->fun_bc->const_table);
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#else
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#define TRACE(ip)
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#endif
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// Value stack grows up (this makes it incompatible with native C stack, but
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// makes sure that arguments to functions are in natural order arg1..argN
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// (Python semantics mandates left-to-right evaluation order, including for
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// function arguments). Stack pointer is pre-incremented and points at the
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// top element.
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// Exception stack also grows up, top element is also pointed at.
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// Exception stack unwind reasons (WHY_* in CPython-speak)
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// TODO perhaps compress this to RETURN=0, JUMP>0, with number of unwinds
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// left to do encoded in the JUMP number
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typedef enum {
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UNWIND_RETURN = 1,
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UNWIND_JUMP,
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} mp_unwind_reason_t;
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#define DECODE_UINT \
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mp_uint_t unum = 0; \
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do { \
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unum = (unum << 7) + (*ip & 0x7f); \
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} while ((*ip++ & 0x80) != 0)
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#define DECODE_ULABEL size_t ulab = (ip[0] | (ip[1] << 8)); ip += 2
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#define DECODE_SLABEL size_t slab = (ip[0] | (ip[1] << 8)) - 0x8000; ip += 2
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#if MICROPY_PERSISTENT_CODE
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#define DECODE_QSTR \
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qstr qst = ip[0] | ip[1] << 8; \
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ip += 2;
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#define DECODE_PTR \
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DECODE_UINT; \
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void *ptr = (void*)(uintptr_t)code_state->fun_bc->const_table[unum]
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#define DECODE_OBJ \
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DECODE_UINT; \
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mp_obj_t obj = (mp_obj_t)code_state->fun_bc->const_table[unum]
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#else
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#define DECODE_QSTR qstr qst = 0; \
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do { \
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qst = (qst << 7) + (*ip & 0x7f); \
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} while ((*ip++ & 0x80) != 0)
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#define DECODE_PTR \
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ip = (byte*)MP_ALIGN(ip, sizeof(void*)); \
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void *ptr = *(void**)ip; \
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ip += sizeof(void*)
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#define DECODE_OBJ \
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ip = (byte*)MP_ALIGN(ip, sizeof(mp_obj_t)); \
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mp_obj_t obj = *(mp_obj_t*)ip; \
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ip += sizeof(mp_obj_t)
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#endif
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#define PUSH(val) *++sp = (val)
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#define POP() (*sp--)
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#define TOP() (*sp)
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#define SET_TOP(val) *sp = (val)
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#if MICROPY_PY_SYS_EXC_INFO
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#define CLEAR_SYS_EXC_INFO() MP_STATE_VM(cur_exception) = NULL;
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#else
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#define CLEAR_SYS_EXC_INFO()
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#endif
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#define PUSH_EXC_BLOCK(with_or_finally) do { \
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DECODE_ULABEL; /* except labels are always forward */ \
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++exc_sp; \
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exc_sp->handler = ip + ulab; \
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exc_sp->val_sp = MP_TAGPTR_MAKE(sp, ((with_or_finally) << 1) | currently_in_except_block); \
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exc_sp->prev_exc = NULL; \
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currently_in_except_block = 0; /* in a try block now */ \
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} while (0)
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#define POP_EXC_BLOCK() \
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currently_in_except_block = MP_TAGPTR_TAG0(exc_sp->val_sp); /* restore previous state */ \
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exc_sp--; /* pop back to previous exception handler */ \
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CLEAR_SYS_EXC_INFO() /* just clear sys.exc_info(), not compliant, but it shouldn't be used in 1st place */
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// fastn has items in reverse order (fastn[0] is local[0], fastn[-1] is local[1], etc)
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// sp points to bottom of stack which grows up
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// returns:
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// MP_VM_RETURN_NORMAL, sp valid, return value in *sp
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// MP_VM_RETURN_YIELD, ip, sp valid, yielded value in *sp
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// MP_VM_RETURN_EXCEPTION, exception in fastn[0]
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mp_vm_return_kind_t mp_execute_bytecode(mp_code_state_t *code_state, volatile mp_obj_t inject_exc) {
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#define SELECTIVE_EXC_IP (0)
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#if SELECTIVE_EXC_IP
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#define MARK_EXC_IP_SELECTIVE() { code_state->ip = ip; } /* stores ip 1 byte past last opcode */
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#define MARK_EXC_IP_GLOBAL()
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#else
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#define MARK_EXC_IP_SELECTIVE()
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#define MARK_EXC_IP_GLOBAL() { code_state->ip = ip; } /* stores ip pointing to last opcode */
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#endif
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#if MICROPY_OPT_COMPUTED_GOTO
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#include "py/vmentrytable.h"
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#define DISPATCH() do { \
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TRACE(ip); \
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MARK_EXC_IP_GLOBAL(); \
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goto *entry_table[*ip++]; \
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} while (0)
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#define DISPATCH_WITH_PEND_EXC_CHECK() goto pending_exception_check
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#define ENTRY(op) entry_##op
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#define ENTRY_DEFAULT entry_default
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#else
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#define DISPATCH() break
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#define DISPATCH_WITH_PEND_EXC_CHECK() goto pending_exception_check
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#define ENTRY(op) case op
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#define ENTRY_DEFAULT default
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#endif
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// nlr_raise needs to be implemented as a goto, so that the C compiler's flow analyser
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// sees that it's possible for us to jump from the dispatch loop to the exception
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// handler. Without this, the code may have a different stack layout in the dispatch
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// loop and the exception handler, leading to very obscure bugs.
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#define RAISE(o) do { nlr_pop(); nlr.ret_val = MP_OBJ_TO_PTR(o); goto exception_handler; } while (0)
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#if MICROPY_STACKLESS
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run_code_state: ;
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#endif
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// Pointers which are constant for particular invocation of mp_execute_bytecode()
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size_t n_state = mp_decode_uint_value(code_state->fun_bc->bytecode);
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mp_obj_t * /*const*/ fastn = &code_state->state[n_state - 1];
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mp_exc_stack_t * /*const*/ exc_stack = (mp_exc_stack_t*)(code_state->state + n_state);
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// variables that are visible to the exception handler (declared volatile)
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volatile bool currently_in_except_block = MP_TAGPTR_TAG0(code_state->exc_sp); // 0 or 1, to detect nested exceptions
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mp_exc_stack_t *volatile exc_sp = MP_TAGPTR_PTR(code_state->exc_sp); // stack grows up, exc_sp points to top of stack
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#if MICROPY_PY_THREAD_GIL && MICROPY_PY_THREAD_GIL_VM_DIVISOR
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// This needs to be volatile and outside the VM loop so it persists across handling
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// of any exceptions. Otherwise it's possible that the VM never gives up the GIL.
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volatile int gil_divisor = MICROPY_PY_THREAD_GIL_VM_DIVISOR;
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#endif
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// outer exception handling loop
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for (;;) {
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nlr_buf_t nlr;
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outer_dispatch_loop:
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if (nlr_push(&nlr) == 0) {
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// local variables that are not visible to the exception handler
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const byte *ip = code_state->ip;
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mp_obj_t *sp = code_state->sp;
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mp_obj_t obj_shared;
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MICROPY_VM_HOOK_INIT
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// If we have exception to inject, now that we finish setting up
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// execution context, raise it. This works as if RAISE_VARARGS
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// bytecode was executed.
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// Injecting exc into yield from generator is a special case,
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// handled by MP_BC_YIELD_FROM itself
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if (inject_exc != MP_OBJ_NULL && *ip != MP_BC_YIELD_FROM) {
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mp_obj_t exc = inject_exc;
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inject_exc = MP_OBJ_NULL;
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exc = mp_make_raise_obj(exc);
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RAISE(exc);
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}
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// loop to execute byte code
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for (;;) {
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dispatch_loop:
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#if MICROPY_OPT_COMPUTED_GOTO
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DISPATCH();
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#else
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TRACE(ip);
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MARK_EXC_IP_GLOBAL();
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switch (*ip++) {
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#endif
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ENTRY(MP_BC_LOAD_CONST_FALSE):
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PUSH(mp_const_false);
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DISPATCH();
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ENTRY(MP_BC_LOAD_CONST_NONE):
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PUSH(mp_const_none);
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DISPATCH();
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ENTRY(MP_BC_LOAD_CONST_TRUE):
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PUSH(mp_const_true);
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DISPATCH();
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ENTRY(MP_BC_LOAD_CONST_SMALL_INT): {
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mp_int_t num = 0;
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if ((ip[0] & 0x40) != 0) {
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// Number is negative
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num--;
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}
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do {
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num = (num << 7) | (*ip & 0x7f);
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} while ((*ip++ & 0x80) != 0);
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PUSH(MP_OBJ_NEW_SMALL_INT(num));
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DISPATCH();
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}
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ENTRY(MP_BC_LOAD_CONST_STRING): {
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DECODE_QSTR;
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PUSH(MP_OBJ_NEW_QSTR(qst));
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DISPATCH();
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}
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ENTRY(MP_BC_LOAD_CONST_OBJ): {
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DECODE_OBJ;
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PUSH(obj);
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DISPATCH();
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}
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ENTRY(MP_BC_LOAD_NULL):
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PUSH(MP_OBJ_NULL);
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DISPATCH();
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ENTRY(MP_BC_LOAD_FAST_N): {
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DECODE_UINT;
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obj_shared = fastn[-unum];
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load_check:
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if (obj_shared == MP_OBJ_NULL) {
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local_name_error: {
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MARK_EXC_IP_SELECTIVE();
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mp_obj_t obj = mp_obj_new_exception_msg(&mp_type_NameError, "local variable referenced before assignment");
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RAISE(obj);
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}
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}
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PUSH(obj_shared);
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DISPATCH();
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}
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ENTRY(MP_BC_LOAD_DEREF): {
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DECODE_UINT;
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obj_shared = mp_obj_cell_get(fastn[-unum]);
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goto load_check;
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}
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#if !MICROPY_OPT_CACHE_MAP_LOOKUP_IN_BYTECODE
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ENTRY(MP_BC_LOAD_NAME): {
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MARK_EXC_IP_SELECTIVE();
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DECODE_QSTR;
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PUSH(mp_load_name(qst));
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DISPATCH();
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}
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#else
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ENTRY(MP_BC_LOAD_NAME): {
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MARK_EXC_IP_SELECTIVE();
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DECODE_QSTR;
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mp_obj_t key = MP_OBJ_NEW_QSTR(qst);
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mp_uint_t x = *ip;
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if (x < mp_locals_get()->map.alloc && mp_locals_get()->map.table[x].key == key) {
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PUSH(mp_locals_get()->map.table[x].value);
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} else {
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mp_map_elem_t *elem = mp_map_lookup(&mp_locals_get()->map, MP_OBJ_NEW_QSTR(qst), MP_MAP_LOOKUP);
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if (elem != NULL) {
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*(byte*)ip = (elem - &mp_locals_get()->map.table[0]) & 0xff;
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PUSH(elem->value);
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} else {
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PUSH(mp_load_name(MP_OBJ_QSTR_VALUE(key)));
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}
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}
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ip++;
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DISPATCH();
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}
|
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#endif
|
|
|
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#if !MICROPY_OPT_CACHE_MAP_LOOKUP_IN_BYTECODE
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ENTRY(MP_BC_LOAD_GLOBAL): {
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MARK_EXC_IP_SELECTIVE();
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DECODE_QSTR;
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PUSH(mp_load_global(qst));
|
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DISPATCH();
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}
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#else
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ENTRY(MP_BC_LOAD_GLOBAL): {
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MARK_EXC_IP_SELECTIVE();
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DECODE_QSTR;
|
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mp_obj_t key = MP_OBJ_NEW_QSTR(qst);
|
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mp_uint_t x = *ip;
|
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if (x < mp_globals_get()->map.alloc && mp_globals_get()->map.table[x].key == key) {
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PUSH(mp_globals_get()->map.table[x].value);
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} else {
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mp_map_elem_t *elem = mp_map_lookup(&mp_globals_get()->map, MP_OBJ_NEW_QSTR(qst), MP_MAP_LOOKUP);
|
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if (elem != NULL) {
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*(byte*)ip = (elem - &mp_globals_get()->map.table[0]) & 0xff;
|
|
PUSH(elem->value);
|
|
} else {
|
|
PUSH(mp_load_global(MP_OBJ_QSTR_VALUE(key)));
|
|
}
|
|
}
|
|
ip++;
|
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DISPATCH();
|
|
}
|
|
#endif
|
|
|
|
#if !MICROPY_OPT_CACHE_MAP_LOOKUP_IN_BYTECODE
|
|
ENTRY(MP_BC_LOAD_ATTR): {
|
|
MARK_EXC_IP_SELECTIVE();
|
|
DECODE_QSTR;
|
|
SET_TOP(mp_load_attr(TOP(), qst));
|
|
DISPATCH();
|
|
}
|
|
#else
|
|
ENTRY(MP_BC_LOAD_ATTR): {
|
|
MARK_EXC_IP_SELECTIVE();
|
|
DECODE_QSTR;
|
|
mp_obj_t top = TOP();
|
|
if (mp_obj_get_type(top)->attr == mp_obj_instance_attr) {
|
|
mp_obj_instance_t *self = MP_OBJ_TO_PTR(top);
|
|
mp_uint_t x = *ip;
|
|
mp_obj_t key = MP_OBJ_NEW_QSTR(qst);
|
|
mp_map_elem_t *elem;
|
|
if (x < self->members.alloc && self->members.table[x].key == key) {
|
|
elem = &self->members.table[x];
|
|
} else {
|
|
elem = mp_map_lookup(&self->members, key, MP_MAP_LOOKUP);
|
|
if (elem != NULL) {
|
|
*(byte*)ip = elem - &self->members.table[0];
|
|
} else {
|
|
goto load_attr_cache_fail;
|
|
}
|
|
}
|
|
SET_TOP(elem->value);
|
|
ip++;
|
|
DISPATCH();
|
|
}
|
|
load_attr_cache_fail:
|
|
SET_TOP(mp_load_attr(top, qst));
|
|
ip++;
|
|
DISPATCH();
|
|
}
|
|
#endif
|
|
|
|
ENTRY(MP_BC_LOAD_METHOD): {
|
|
MARK_EXC_IP_SELECTIVE();
|
|
DECODE_QSTR;
|
|
mp_load_method(*sp, qst, sp);
|
|
sp += 1;
|
|
DISPATCH();
|
|
}
|
|
|
|
ENTRY(MP_BC_LOAD_SUPER_METHOD): {
|
|
MARK_EXC_IP_SELECTIVE();
|
|
DECODE_QSTR;
|
|
sp -= 1;
|
|
mp_load_super_method(qst, sp - 1);
|
|
DISPATCH();
|
|
}
|
|
|
|
ENTRY(MP_BC_LOAD_BUILD_CLASS):
|
|
MARK_EXC_IP_SELECTIVE();
|
|
PUSH(mp_load_build_class());
|
|
DISPATCH();
|
|
|
|
ENTRY(MP_BC_LOAD_SUBSCR): {
|
|
MARK_EXC_IP_SELECTIVE();
|
|
mp_obj_t index = POP();
|
|
SET_TOP(mp_obj_subscr(TOP(), index, MP_OBJ_SENTINEL));
|
|
DISPATCH();
|
|
}
|
|
|
|
ENTRY(MP_BC_STORE_FAST_N): {
|
|
DECODE_UINT;
|
|
fastn[-unum] = POP();
|
|
DISPATCH();
|
|
}
|
|
|
|
ENTRY(MP_BC_STORE_DEREF): {
|
|
DECODE_UINT;
|
|
mp_obj_cell_set(fastn[-unum], POP());
|
|
DISPATCH();
|
|
}
|
|
|
|
ENTRY(MP_BC_STORE_NAME): {
|
|
MARK_EXC_IP_SELECTIVE();
|
|
DECODE_QSTR;
|
|
mp_store_name(qst, POP());
|
|
DISPATCH();
|
|
}
|
|
|
|
ENTRY(MP_BC_STORE_GLOBAL): {
|
|
MARK_EXC_IP_SELECTIVE();
|
|
DECODE_QSTR;
|
|
mp_store_global(qst, POP());
|
|
DISPATCH();
|
|
}
|
|
|
|
#if !MICROPY_OPT_CACHE_MAP_LOOKUP_IN_BYTECODE
|
|
ENTRY(MP_BC_STORE_ATTR): {
|
|
MARK_EXC_IP_SELECTIVE();
|
|
DECODE_QSTR;
|
|
mp_store_attr(sp[0], qst, sp[-1]);
|
|
sp -= 2;
|
|
DISPATCH();
|
|
}
|
|
#else
|
|
// This caching code works with MICROPY_PY_BUILTINS_PROPERTY and/or
|
|
// MICROPY_PY_DESCRIPTORS enabled because if the attr exists in
|
|
// self->members then it can't be a property or have descriptors. A
|
|
// consequence of this is that we can't use MP_MAP_LOOKUP_ADD_IF_NOT_FOUND
|
|
// in the fast-path below, because that store could override a property.
|
|
ENTRY(MP_BC_STORE_ATTR): {
|
|
MARK_EXC_IP_SELECTIVE();
|
|
DECODE_QSTR;
|
|
mp_obj_t top = TOP();
|
|
if (mp_obj_get_type(top)->attr == mp_obj_instance_attr && sp[-1] != MP_OBJ_NULL) {
|
|
mp_obj_instance_t *self = MP_OBJ_TO_PTR(top);
|
|
mp_uint_t x = *ip;
|
|
mp_obj_t key = MP_OBJ_NEW_QSTR(qst);
|
|
mp_map_elem_t *elem;
|
|
if (x < self->members.alloc && self->members.table[x].key == key) {
|
|
elem = &self->members.table[x];
|
|
} else {
|
|
elem = mp_map_lookup(&self->members, key, MP_MAP_LOOKUP);
|
|
if (elem != NULL) {
|
|
*(byte*)ip = elem - &self->members.table[0];
|
|
} else {
|
|
goto store_attr_cache_fail;
|
|
}
|
|
}
|
|
elem->value = sp[-1];
|
|
sp -= 2;
|
|
ip++;
|
|
DISPATCH();
|
|
}
|
|
store_attr_cache_fail:
|
|
mp_store_attr(sp[0], qst, sp[-1]);
|
|
sp -= 2;
|
|
ip++;
|
|
DISPATCH();
|
|
}
|
|
#endif
|
|
|
|
ENTRY(MP_BC_STORE_SUBSCR):
|
|
MARK_EXC_IP_SELECTIVE();
|
|
mp_obj_subscr(sp[-1], sp[0], sp[-2]);
|
|
sp -= 3;
|
|
DISPATCH();
|
|
|
|
ENTRY(MP_BC_DELETE_FAST): {
|
|
MARK_EXC_IP_SELECTIVE();
|
|
DECODE_UINT;
|
|
if (fastn[-unum] == MP_OBJ_NULL) {
|
|
goto local_name_error;
|
|
}
|
|
fastn[-unum] = MP_OBJ_NULL;
|
|
DISPATCH();
|
|
}
|
|
|
|
ENTRY(MP_BC_DELETE_DEREF): {
|
|
MARK_EXC_IP_SELECTIVE();
|
|
DECODE_UINT;
|
|
if (mp_obj_cell_get(fastn[-unum]) == MP_OBJ_NULL) {
|
|
goto local_name_error;
|
|
}
|
|
mp_obj_cell_set(fastn[-unum], MP_OBJ_NULL);
|
|
DISPATCH();
|
|
}
|
|
|
|
ENTRY(MP_BC_DELETE_NAME): {
|
|
MARK_EXC_IP_SELECTIVE();
|
|
DECODE_QSTR;
|
|
mp_delete_name(qst);
|
|
DISPATCH();
|
|
}
|
|
|
|
ENTRY(MP_BC_DELETE_GLOBAL): {
|
|
MARK_EXC_IP_SELECTIVE();
|
|
DECODE_QSTR;
|
|
mp_delete_global(qst);
|
|
DISPATCH();
|
|
}
|
|
|
|
ENTRY(MP_BC_DUP_TOP): {
|
|
mp_obj_t top = TOP();
|
|
PUSH(top);
|
|
DISPATCH();
|
|
}
|
|
|
|
ENTRY(MP_BC_DUP_TOP_TWO):
|
|
sp += 2;
|
|
sp[0] = sp[-2];
|
|
sp[-1] = sp[-3];
|
|
DISPATCH();
|
|
|
|
ENTRY(MP_BC_POP_TOP):
|
|
sp -= 1;
|
|
DISPATCH();
|
|
|
|
ENTRY(MP_BC_ROT_TWO): {
|
|
mp_obj_t top = sp[0];
|
|
sp[0] = sp[-1];
|
|
sp[-1] = top;
|
|
DISPATCH();
|
|
}
|
|
|
|
ENTRY(MP_BC_ROT_THREE): {
|
|
mp_obj_t top = sp[0];
|
|
sp[0] = sp[-1];
|
|
sp[-1] = sp[-2];
|
|
sp[-2] = top;
|
|
DISPATCH();
|
|
}
|
|
|
|
ENTRY(MP_BC_JUMP): {
|
|
DECODE_SLABEL;
|
|
ip += slab;
|
|
DISPATCH_WITH_PEND_EXC_CHECK();
|
|
}
|
|
|
|
ENTRY(MP_BC_POP_JUMP_IF_TRUE): {
|
|
DECODE_SLABEL;
|
|
if (mp_obj_is_true(POP())) {
|
|
ip += slab;
|
|
}
|
|
DISPATCH_WITH_PEND_EXC_CHECK();
|
|
}
|
|
|
|
ENTRY(MP_BC_POP_JUMP_IF_FALSE): {
|
|
DECODE_SLABEL;
|
|
if (!mp_obj_is_true(POP())) {
|
|
ip += slab;
|
|
}
|
|
DISPATCH_WITH_PEND_EXC_CHECK();
|
|
}
|
|
|
|
ENTRY(MP_BC_JUMP_IF_TRUE_OR_POP): {
|
|
DECODE_SLABEL;
|
|
if (mp_obj_is_true(TOP())) {
|
|
ip += slab;
|
|
} else {
|
|
sp--;
|
|
}
|
|
DISPATCH_WITH_PEND_EXC_CHECK();
|
|
}
|
|
|
|
ENTRY(MP_BC_JUMP_IF_FALSE_OR_POP): {
|
|
DECODE_SLABEL;
|
|
if (mp_obj_is_true(TOP())) {
|
|
sp--;
|
|
} else {
|
|
ip += slab;
|
|
}
|
|
DISPATCH_WITH_PEND_EXC_CHECK();
|
|
}
|
|
|
|
ENTRY(MP_BC_SETUP_WITH): {
|
|
MARK_EXC_IP_SELECTIVE();
|
|
// stack: (..., ctx_mgr)
|
|
mp_obj_t obj = TOP();
|
|
mp_load_method(obj, MP_QSTR___exit__, sp);
|
|
mp_load_method(obj, MP_QSTR___enter__, sp + 2);
|
|
mp_obj_t ret = mp_call_method_n_kw(0, 0, sp + 2);
|
|
sp += 1;
|
|
PUSH_EXC_BLOCK(1);
|
|
PUSH(ret);
|
|
// stack: (..., __exit__, ctx_mgr, as_value)
|
|
DISPATCH();
|
|
}
|
|
|
|
ENTRY(MP_BC_WITH_CLEANUP): {
|
|
MARK_EXC_IP_SELECTIVE();
|
|
// Arriving here, there's "exception control block" on top of stack,
|
|
// and __exit__ method (with self) underneath it. Bytecode calls __exit__,
|
|
// and "deletes" it off stack, shifting "exception control block"
|
|
// to its place.
|
|
// The bytecode emitter ensures that there is enough space on the Python
|
|
// value stack to hold the __exit__ method plus an additional 4 entries.
|
|
if (TOP() == mp_const_none) {
|
|
// stack: (..., __exit__, ctx_mgr, None)
|
|
sp[1] = mp_const_none;
|
|
sp[2] = mp_const_none;
|
|
sp -= 2;
|
|
mp_call_method_n_kw(3, 0, sp);
|
|
SET_TOP(mp_const_none);
|
|
} else if (MP_OBJ_IS_SMALL_INT(TOP())) {
|
|
mp_int_t cause_val = MP_OBJ_SMALL_INT_VALUE(TOP());
|
|
if (cause_val == UNWIND_RETURN) {
|
|
// stack: (..., __exit__, ctx_mgr, ret_val, UNWIND_RETURN)
|
|
mp_obj_t ret_val = sp[-1];
|
|
sp[-1] = mp_const_none;
|
|
sp[0] = mp_const_none;
|
|
sp[1] = mp_const_none;
|
|
mp_call_method_n_kw(3, 0, sp - 3);
|
|
sp[-3] = ret_val;
|
|
sp[-2] = MP_OBJ_NEW_SMALL_INT(UNWIND_RETURN);
|
|
} else {
|
|
assert(cause_val == UNWIND_JUMP);
|
|
// stack: (..., __exit__, ctx_mgr, dest_ip, num_exc, UNWIND_JUMP)
|
|
mp_obj_t dest_ip = sp[-2];
|
|
mp_obj_t num_exc = sp[-1];
|
|
sp[-2] = mp_const_none;
|
|
sp[-1] = mp_const_none;
|
|
sp[0] = mp_const_none;
|
|
mp_call_method_n_kw(3, 0, sp - 4);
|
|
sp[-4] = dest_ip;
|
|
sp[-3] = num_exc;
|
|
sp[-2] = MP_OBJ_NEW_SMALL_INT(UNWIND_JUMP);
|
|
}
|
|
sp -= 2; // we removed (__exit__, ctx_mgr)
|
|
} else {
|
|
assert(mp_obj_is_exception_instance(TOP()));
|
|
// stack: (..., __exit__, ctx_mgr, exc_instance)
|
|
// Need to pass (exc_type, exc_instance, None) as arguments to __exit__.
|
|
sp[1] = sp[0];
|
|
sp[0] = MP_OBJ_FROM_PTR(mp_obj_get_type(sp[0]));
|
|
sp[2] = mp_const_none;
|
|
sp -= 2;
|
|
mp_obj_t ret_value = mp_call_method_n_kw(3, 0, sp);
|
|
if (mp_obj_is_true(ret_value)) {
|
|
// We need to silence/swallow the exception. This is done
|
|
// by popping the exception and the __exit__ handler and
|
|
// replacing it with None, which signals END_FINALLY to just
|
|
// execute the finally handler normally.
|
|
SET_TOP(mp_const_none);
|
|
assert(exc_sp >= exc_stack);
|
|
POP_EXC_BLOCK();
|
|
} else {
|
|
// We need to re-raise the exception. We pop __exit__ handler
|
|
// by copying the exception instance down to the new top-of-stack.
|
|
sp[0] = sp[3];
|
|
}
|
|
}
|
|
DISPATCH();
|
|
}
|
|
|
|
ENTRY(MP_BC_UNWIND_JUMP): {
|
|
MARK_EXC_IP_SELECTIVE();
|
|
DECODE_SLABEL;
|
|
PUSH((mp_obj_t)(mp_uint_t)(uintptr_t)(ip + slab)); // push destination ip for jump
|
|
PUSH((mp_obj_t)(mp_uint_t)(*ip)); // push number of exception handlers to unwind (0x80 bit set if we also need to pop stack)
|
|
unwind_jump:;
|
|
mp_uint_t unum = (mp_uint_t)POP(); // get number of exception handlers to unwind
|
|
while ((unum & 0x7f) > 0) {
|
|
unum -= 1;
|
|
assert(exc_sp >= exc_stack);
|
|
if (MP_TAGPTR_TAG1(exc_sp->val_sp)) {
|
|
// Getting here the stack looks like:
|
|
// (..., X, dest_ip)
|
|
// where X is pointed to by exc_sp->val_sp and in the case
|
|
// of a "with" block contains the context manager info.
|
|
// We're going to run "finally" code as a coroutine
|
|
// (not calling it recursively). Set up a sentinel
|
|
// on a stack so it can return back to us when it is
|
|
// done (when WITH_CLEANUP or END_FINALLY reached).
|
|
PUSH((mp_obj_t)unum); // push number of exception handlers left to unwind
|
|
PUSH(MP_OBJ_NEW_SMALL_INT(UNWIND_JUMP)); // push sentinel
|
|
ip = exc_sp->handler; // get exception handler byte code address
|
|
exc_sp--; // pop exception handler
|
|
goto dispatch_loop; // run the exception handler
|
|
}
|
|
POP_EXC_BLOCK();
|
|
}
|
|
ip = (const byte*)MP_OBJ_TO_PTR(POP()); // pop destination ip for jump
|
|
if (unum != 0) {
|
|
// pop the exhausted iterator
|
|
sp -= MP_OBJ_ITER_BUF_NSLOTS;
|
|
}
|
|
DISPATCH_WITH_PEND_EXC_CHECK();
|
|
}
|
|
|
|
// matched against: POP_BLOCK or POP_EXCEPT (anything else?)
|
|
ENTRY(MP_BC_SETUP_EXCEPT):
|
|
ENTRY(MP_BC_SETUP_FINALLY): {
|
|
MARK_EXC_IP_SELECTIVE();
|
|
#if SELECTIVE_EXC_IP
|
|
PUSH_EXC_BLOCK((code_state->ip[-1] == MP_BC_SETUP_FINALLY) ? 1 : 0);
|
|
#else
|
|
PUSH_EXC_BLOCK((code_state->ip[0] == MP_BC_SETUP_FINALLY) ? 1 : 0);
|
|
#endif
|
|
DISPATCH();
|
|
}
|
|
|
|
ENTRY(MP_BC_END_FINALLY):
|
|
MARK_EXC_IP_SELECTIVE();
|
|
// if TOS is None, just pops it and continues
|
|
// if TOS is an integer, finishes coroutine and returns control to caller
|
|
// if TOS is an exception, reraises the exception
|
|
if (TOP() == mp_const_none) {
|
|
sp--;
|
|
} else if (MP_OBJ_IS_SMALL_INT(TOP())) {
|
|
// We finished "finally" coroutine and now dispatch back
|
|
// to our caller, based on TOS value
|
|
mp_unwind_reason_t reason = MP_OBJ_SMALL_INT_VALUE(POP());
|
|
if (reason == UNWIND_RETURN) {
|
|
goto unwind_return;
|
|
} else {
|
|
assert(reason == UNWIND_JUMP);
|
|
goto unwind_jump;
|
|
}
|
|
} else {
|
|
assert(mp_obj_is_exception_instance(TOP()));
|
|
RAISE(TOP());
|
|
}
|
|
DISPATCH();
|
|
|
|
ENTRY(MP_BC_GET_ITER):
|
|
MARK_EXC_IP_SELECTIVE();
|
|
SET_TOP(mp_getiter(TOP(), NULL));
|
|
DISPATCH();
|
|
|
|
// An iterator for a for-loop takes MP_OBJ_ITER_BUF_NSLOTS slots on
|
|
// the Python value stack. These slots are either used to store the
|
|
// iterator object itself, or the first slot is MP_OBJ_NULL and
|
|
// the second slot holds a reference to the iterator object.
|
|
ENTRY(MP_BC_GET_ITER_STACK): {
|
|
MARK_EXC_IP_SELECTIVE();
|
|
mp_obj_t obj = TOP();
|
|
mp_obj_iter_buf_t *iter_buf = (mp_obj_iter_buf_t*)sp;
|
|
sp += MP_OBJ_ITER_BUF_NSLOTS - 1;
|
|
obj = mp_getiter(obj, iter_buf);
|
|
if (obj != MP_OBJ_FROM_PTR(iter_buf)) {
|
|
// Iterator didn't use the stack so indicate that with MP_OBJ_NULL.
|
|
sp[-MP_OBJ_ITER_BUF_NSLOTS + 1] = MP_OBJ_NULL;
|
|
sp[-MP_OBJ_ITER_BUF_NSLOTS + 2] = obj;
|
|
}
|
|
DISPATCH();
|
|
}
|
|
|
|
ENTRY(MP_BC_FOR_ITER): {
|
|
MARK_EXC_IP_SELECTIVE();
|
|
DECODE_ULABEL; // the jump offset if iteration finishes; for labels are always forward
|
|
code_state->sp = sp;
|
|
mp_obj_t obj;
|
|
if (sp[-MP_OBJ_ITER_BUF_NSLOTS + 1] == MP_OBJ_NULL) {
|
|
obj = sp[-MP_OBJ_ITER_BUF_NSLOTS + 2];
|
|
} else {
|
|
obj = MP_OBJ_FROM_PTR(&sp[-MP_OBJ_ITER_BUF_NSLOTS + 1]);
|
|
}
|
|
mp_obj_t value = mp_iternext_allow_raise(obj);
|
|
if (value == MP_OBJ_STOP_ITERATION) {
|
|
sp -= MP_OBJ_ITER_BUF_NSLOTS; // pop the exhausted iterator
|
|
ip += ulab; // jump to after for-block
|
|
} else {
|
|
PUSH(value); // push the next iteration value
|
|
}
|
|
DISPATCH();
|
|
}
|
|
|
|
// matched against: SETUP_EXCEPT, SETUP_FINALLY, SETUP_WITH
|
|
ENTRY(MP_BC_POP_BLOCK):
|
|
// we are exiting an exception handler, so pop the last one of the exception-stack
|
|
assert(exc_sp >= exc_stack);
|
|
POP_EXC_BLOCK();
|
|
DISPATCH();
|
|
|
|
// matched against: SETUP_EXCEPT
|
|
ENTRY(MP_BC_POP_EXCEPT):
|
|
assert(exc_sp >= exc_stack);
|
|
assert(currently_in_except_block);
|
|
POP_EXC_BLOCK();
|
|
DISPATCH();
|
|
|
|
ENTRY(MP_BC_BUILD_TUPLE): {
|
|
MARK_EXC_IP_SELECTIVE();
|
|
DECODE_UINT;
|
|
sp -= unum - 1;
|
|
SET_TOP(mp_obj_new_tuple(unum, sp));
|
|
DISPATCH();
|
|
}
|
|
|
|
ENTRY(MP_BC_BUILD_LIST): {
|
|
MARK_EXC_IP_SELECTIVE();
|
|
DECODE_UINT;
|
|
sp -= unum - 1;
|
|
SET_TOP(mp_obj_new_list(unum, sp));
|
|
DISPATCH();
|
|
}
|
|
|
|
ENTRY(MP_BC_BUILD_MAP): {
|
|
MARK_EXC_IP_SELECTIVE();
|
|
DECODE_UINT;
|
|
PUSH(mp_obj_new_dict(unum));
|
|
DISPATCH();
|
|
}
|
|
|
|
ENTRY(MP_BC_STORE_MAP):
|
|
MARK_EXC_IP_SELECTIVE();
|
|
sp -= 2;
|
|
mp_obj_dict_store(sp[0], sp[2], sp[1]);
|
|
DISPATCH();
|
|
|
|
#if MICROPY_PY_BUILTINS_SET
|
|
ENTRY(MP_BC_BUILD_SET): {
|
|
MARK_EXC_IP_SELECTIVE();
|
|
DECODE_UINT;
|
|
sp -= unum - 1;
|
|
SET_TOP(mp_obj_new_set(unum, sp));
|
|
DISPATCH();
|
|
}
|
|
#endif
|
|
|
|
#if MICROPY_PY_BUILTINS_SLICE
|
|
ENTRY(MP_BC_BUILD_SLICE): {
|
|
MARK_EXC_IP_SELECTIVE();
|
|
DECODE_UINT;
|
|
if (unum == 2) {
|
|
mp_obj_t stop = POP();
|
|
mp_obj_t start = TOP();
|
|
SET_TOP(mp_obj_new_slice(start, stop, mp_const_none));
|
|
} else {
|
|
mp_obj_t step = POP();
|
|
mp_obj_t stop = POP();
|
|
mp_obj_t start = TOP();
|
|
SET_TOP(mp_obj_new_slice(start, stop, step));
|
|
}
|
|
DISPATCH();
|
|
}
|
|
#endif
|
|
|
|
ENTRY(MP_BC_STORE_COMP): {
|
|
MARK_EXC_IP_SELECTIVE();
|
|
DECODE_UINT;
|
|
mp_obj_t obj = sp[-(unum >> 2)];
|
|
if ((unum & 3) == 0) {
|
|
mp_obj_list_append(obj, sp[0]);
|
|
sp--;
|
|
} else if (!MICROPY_PY_BUILTINS_SET || (unum & 3) == 1) {
|
|
mp_obj_dict_store(obj, sp[0], sp[-1]);
|
|
sp -= 2;
|
|
#if MICROPY_PY_BUILTINS_SET
|
|
} else {
|
|
mp_obj_set_store(obj, sp[0]);
|
|
sp--;
|
|
#endif
|
|
}
|
|
DISPATCH();
|
|
}
|
|
|
|
ENTRY(MP_BC_UNPACK_SEQUENCE): {
|
|
MARK_EXC_IP_SELECTIVE();
|
|
DECODE_UINT;
|
|
mp_unpack_sequence(sp[0], unum, sp);
|
|
sp += unum - 1;
|
|
DISPATCH();
|
|
}
|
|
|
|
ENTRY(MP_BC_UNPACK_EX): {
|
|
MARK_EXC_IP_SELECTIVE();
|
|
DECODE_UINT;
|
|
mp_unpack_ex(sp[0], unum, sp);
|
|
sp += (unum & 0xff) + ((unum >> 8) & 0xff);
|
|
DISPATCH();
|
|
}
|
|
|
|
ENTRY(MP_BC_MAKE_FUNCTION): {
|
|
DECODE_PTR;
|
|
PUSH(mp_make_function_from_raw_code(ptr, MP_OBJ_NULL, MP_OBJ_NULL));
|
|
DISPATCH();
|
|
}
|
|
|
|
ENTRY(MP_BC_MAKE_FUNCTION_DEFARGS): {
|
|
DECODE_PTR;
|
|
// Stack layout: def_tuple def_dict <- TOS
|
|
mp_obj_t def_dict = POP();
|
|
SET_TOP(mp_make_function_from_raw_code(ptr, TOP(), def_dict));
|
|
DISPATCH();
|
|
}
|
|
|
|
ENTRY(MP_BC_MAKE_CLOSURE): {
|
|
DECODE_PTR;
|
|
size_t n_closed_over = *ip++;
|
|
// Stack layout: closed_overs <- TOS
|
|
sp -= n_closed_over - 1;
|
|
SET_TOP(mp_make_closure_from_raw_code(ptr, n_closed_over, sp));
|
|
DISPATCH();
|
|
}
|
|
|
|
ENTRY(MP_BC_MAKE_CLOSURE_DEFARGS): {
|
|
DECODE_PTR;
|
|
size_t n_closed_over = *ip++;
|
|
// Stack layout: def_tuple def_dict closed_overs <- TOS
|
|
sp -= 2 + n_closed_over - 1;
|
|
SET_TOP(mp_make_closure_from_raw_code(ptr, 0x100 | n_closed_over, sp));
|
|
DISPATCH();
|
|
}
|
|
|
|
ENTRY(MP_BC_CALL_FUNCTION): {
|
|
MARK_EXC_IP_SELECTIVE();
|
|
DECODE_UINT;
|
|
// unum & 0xff == n_positional
|
|
// (unum >> 8) & 0xff == n_keyword
|
|
sp -= (unum & 0xff) + ((unum >> 7) & 0x1fe);
|
|
#if MICROPY_STACKLESS
|
|
if (mp_obj_get_type(*sp) == &mp_type_fun_bc) {
|
|
code_state->ip = ip;
|
|
code_state->sp = sp;
|
|
code_state->exc_sp = MP_TAGPTR_MAKE(exc_sp, currently_in_except_block);
|
|
mp_code_state_t *new_state = mp_obj_fun_bc_prepare_codestate(*sp, unum & 0xff, (unum >> 8) & 0xff, sp + 1);
|
|
if (new_state) {
|
|
new_state->prev = code_state;
|
|
code_state = new_state;
|
|
nlr_pop();
|
|
goto run_code_state;
|
|
}
|
|
#if MICROPY_STACKLESS_STRICT
|
|
else {
|
|
deep_recursion_error:
|
|
mp_exc_recursion_depth();
|
|
}
|
|
#endif
|
|
}
|
|
#endif
|
|
SET_TOP(mp_call_function_n_kw(*sp, unum & 0xff, (unum >> 8) & 0xff, sp + 1));
|
|
DISPATCH();
|
|
}
|
|
|
|
ENTRY(MP_BC_CALL_FUNCTION_VAR_KW): {
|
|
MARK_EXC_IP_SELECTIVE();
|
|
DECODE_UINT;
|
|
// unum & 0xff == n_positional
|
|
// (unum >> 8) & 0xff == n_keyword
|
|
// We have following stack layout here:
|
|
// fun arg0 arg1 ... kw0 val0 kw1 val1 ... seq dict <- TOS
|
|
sp -= (unum & 0xff) + ((unum >> 7) & 0x1fe) + 2;
|
|
#if MICROPY_STACKLESS
|
|
if (mp_obj_get_type(*sp) == &mp_type_fun_bc) {
|
|
code_state->ip = ip;
|
|
code_state->sp = sp;
|
|
code_state->exc_sp = MP_TAGPTR_MAKE(exc_sp, currently_in_except_block);
|
|
|
|
mp_call_args_t out_args;
|
|
mp_call_prepare_args_n_kw_var(false, unum, sp, &out_args);
|
|
|
|
mp_code_state_t *new_state = mp_obj_fun_bc_prepare_codestate(out_args.fun,
|
|
out_args.n_args, out_args.n_kw, out_args.args);
|
|
m_del(mp_obj_t, out_args.args, out_args.n_alloc);
|
|
if (new_state) {
|
|
new_state->prev = code_state;
|
|
code_state = new_state;
|
|
nlr_pop();
|
|
goto run_code_state;
|
|
}
|
|
#if MICROPY_STACKLESS_STRICT
|
|
else {
|
|
goto deep_recursion_error;
|
|
}
|
|
#endif
|
|
}
|
|
#endif
|
|
SET_TOP(mp_call_method_n_kw_var(false, unum, sp));
|
|
DISPATCH();
|
|
}
|
|
|
|
ENTRY(MP_BC_CALL_METHOD): {
|
|
MARK_EXC_IP_SELECTIVE();
|
|
DECODE_UINT;
|
|
// unum & 0xff == n_positional
|
|
// (unum >> 8) & 0xff == n_keyword
|
|
sp -= (unum & 0xff) + ((unum >> 7) & 0x1fe) + 1;
|
|
#if MICROPY_STACKLESS
|
|
if (mp_obj_get_type(*sp) == &mp_type_fun_bc) {
|
|
code_state->ip = ip;
|
|
code_state->sp = sp;
|
|
code_state->exc_sp = MP_TAGPTR_MAKE(exc_sp, currently_in_except_block);
|
|
|
|
size_t n_args = unum & 0xff;
|
|
size_t n_kw = (unum >> 8) & 0xff;
|
|
int adjust = (sp[1] == MP_OBJ_NULL) ? 0 : 1;
|
|
|
|
mp_code_state_t *new_state = mp_obj_fun_bc_prepare_codestate(*sp, n_args + adjust, n_kw, sp + 2 - adjust);
|
|
if (new_state) {
|
|
new_state->prev = code_state;
|
|
code_state = new_state;
|
|
nlr_pop();
|
|
goto run_code_state;
|
|
}
|
|
#if MICROPY_STACKLESS_STRICT
|
|
else {
|
|
goto deep_recursion_error;
|
|
}
|
|
#endif
|
|
}
|
|
#endif
|
|
SET_TOP(mp_call_method_n_kw(unum & 0xff, (unum >> 8) & 0xff, sp));
|
|
DISPATCH();
|
|
}
|
|
|
|
ENTRY(MP_BC_CALL_METHOD_VAR_KW): {
|
|
MARK_EXC_IP_SELECTIVE();
|
|
DECODE_UINT;
|
|
// unum & 0xff == n_positional
|
|
// (unum >> 8) & 0xff == n_keyword
|
|
// We have following stack layout here:
|
|
// fun self arg0 arg1 ... kw0 val0 kw1 val1 ... seq dict <- TOS
|
|
sp -= (unum & 0xff) + ((unum >> 7) & 0x1fe) + 3;
|
|
#if MICROPY_STACKLESS
|
|
if (mp_obj_get_type(*sp) == &mp_type_fun_bc) {
|
|
code_state->ip = ip;
|
|
code_state->sp = sp;
|
|
code_state->exc_sp = MP_TAGPTR_MAKE(exc_sp, currently_in_except_block);
|
|
|
|
mp_call_args_t out_args;
|
|
mp_call_prepare_args_n_kw_var(true, unum, sp, &out_args);
|
|
|
|
mp_code_state_t *new_state = mp_obj_fun_bc_prepare_codestate(out_args.fun,
|
|
out_args.n_args, out_args.n_kw, out_args.args);
|
|
m_del(mp_obj_t, out_args.args, out_args.n_alloc);
|
|
if (new_state) {
|
|
new_state->prev = code_state;
|
|
code_state = new_state;
|
|
nlr_pop();
|
|
goto run_code_state;
|
|
}
|
|
#if MICROPY_STACKLESS_STRICT
|
|
else {
|
|
goto deep_recursion_error;
|
|
}
|
|
#endif
|
|
}
|
|
#endif
|
|
SET_TOP(mp_call_method_n_kw_var(true, unum, sp));
|
|
DISPATCH();
|
|
}
|
|
|
|
ENTRY(MP_BC_RETURN_VALUE):
|
|
MARK_EXC_IP_SELECTIVE();
|
|
// These next 3 lines pop a try-finally exception handler, if one
|
|
// is there on the exception stack. Without this the finally block
|
|
// is executed a second time when the return is executed, because
|
|
// the try-finally exception handler is still on the stack.
|
|
// TODO Possibly find a better way to handle this case.
|
|
if (currently_in_except_block) {
|
|
POP_EXC_BLOCK();
|
|
}
|
|
unwind_return:
|
|
while (exc_sp >= exc_stack) {
|
|
if (MP_TAGPTR_TAG1(exc_sp->val_sp)) {
|
|
// Getting here the stack looks like:
|
|
// (..., X, [iter0, iter1, ...,] ret_val)
|
|
// where X is pointed to by exc_sp->val_sp and in the case
|
|
// of a "with" block contains the context manager info.
|
|
// There may be 0 or more for-iterators between X and the
|
|
// return value, and these must be removed before control can
|
|
// pass to the finally code. We simply copy the ret_value down
|
|
// over these iterators, if they exist. If they don't then the
|
|
// following is a null operation.
|
|
mp_obj_t *finally_sp = MP_TAGPTR_PTR(exc_sp->val_sp);
|
|
finally_sp[1] = sp[0];
|
|
sp = &finally_sp[1];
|
|
// We're going to run "finally" code as a coroutine
|
|
// (not calling it recursively). Set up a sentinel
|
|
// on a stack so it can return back to us when it is
|
|
// done (when WITH_CLEANUP or END_FINALLY reached).
|
|
PUSH(MP_OBJ_NEW_SMALL_INT(UNWIND_RETURN));
|
|
ip = exc_sp->handler;
|
|
exc_sp--;
|
|
goto dispatch_loop;
|
|
}
|
|
exc_sp--;
|
|
}
|
|
nlr_pop();
|
|
code_state->sp = sp;
|
|
assert(exc_sp == exc_stack - 1);
|
|
MICROPY_VM_HOOK_RETURN
|
|
#if MICROPY_STACKLESS
|
|
if (code_state->prev != NULL) {
|
|
mp_obj_t res = *sp;
|
|
mp_globals_set(code_state->old_globals);
|
|
code_state = code_state->prev;
|
|
*code_state->sp = res;
|
|
goto run_code_state;
|
|
}
|
|
#endif
|
|
return MP_VM_RETURN_NORMAL;
|
|
|
|
ENTRY(MP_BC_RAISE_VARARGS): {
|
|
MARK_EXC_IP_SELECTIVE();
|
|
mp_uint_t unum = *ip++;
|
|
mp_obj_t obj;
|
|
if (unum == 2) {
|
|
mp_warning("exception chaining not supported");
|
|
// ignore (pop) "from" argument
|
|
sp--;
|
|
}
|
|
if (unum == 0) {
|
|
// search for the inner-most previous exception, to reraise it
|
|
obj = MP_OBJ_NULL;
|
|
for (mp_exc_stack_t *e = exc_sp; e >= exc_stack; e--) {
|
|
if (e->prev_exc != NULL) {
|
|
obj = MP_OBJ_FROM_PTR(e->prev_exc);
|
|
break;
|
|
}
|
|
}
|
|
if (obj == MP_OBJ_NULL) {
|
|
obj = mp_obj_new_exception_msg(&mp_type_RuntimeError, "No active exception to reraise");
|
|
RAISE(obj);
|
|
}
|
|
} else {
|
|
obj = POP();
|
|
}
|
|
obj = mp_make_raise_obj(obj);
|
|
RAISE(obj);
|
|
}
|
|
|
|
ENTRY(MP_BC_YIELD_VALUE):
|
|
yield:
|
|
nlr_pop();
|
|
code_state->ip = ip;
|
|
code_state->sp = sp;
|
|
code_state->exc_sp = MP_TAGPTR_MAKE(exc_sp, currently_in_except_block);
|
|
return MP_VM_RETURN_YIELD;
|
|
|
|
ENTRY(MP_BC_YIELD_FROM): {
|
|
MARK_EXC_IP_SELECTIVE();
|
|
//#define EXC_MATCH(exc, type) MP_OBJ_IS_TYPE(exc, type)
|
|
#define EXC_MATCH(exc, type) mp_obj_exception_match(exc, type)
|
|
#define GENERATOR_EXIT_IF_NEEDED(t) if (t != MP_OBJ_NULL && EXC_MATCH(t, MP_OBJ_FROM_PTR(&mp_type_GeneratorExit))) { RAISE(t); }
|
|
mp_vm_return_kind_t ret_kind;
|
|
mp_obj_t send_value = POP();
|
|
mp_obj_t t_exc = MP_OBJ_NULL;
|
|
mp_obj_t ret_value;
|
|
if (inject_exc != MP_OBJ_NULL) {
|
|
t_exc = inject_exc;
|
|
inject_exc = MP_OBJ_NULL;
|
|
ret_kind = mp_resume(TOP(), MP_OBJ_NULL, t_exc, &ret_value);
|
|
} else {
|
|
ret_kind = mp_resume(TOP(), send_value, MP_OBJ_NULL, &ret_value);
|
|
}
|
|
|
|
if (ret_kind == MP_VM_RETURN_YIELD) {
|
|
ip--;
|
|
PUSH(ret_value);
|
|
goto yield;
|
|
}
|
|
if (ret_kind == MP_VM_RETURN_NORMAL) {
|
|
// Pop exhausted gen
|
|
sp--;
|
|
// TODO: When ret_value can be MP_OBJ_NULL here??
|
|
if (ret_value == MP_OBJ_NULL || ret_value == MP_OBJ_STOP_ITERATION) {
|
|
// Optimize StopIteration
|
|
// TODO: get StopIteration's value
|
|
PUSH(mp_const_none);
|
|
} else {
|
|
PUSH(ret_value);
|
|
}
|
|
|
|
// If we injected GeneratorExit downstream, then even
|
|
// if it was swallowed, we re-raise GeneratorExit
|
|
GENERATOR_EXIT_IF_NEEDED(t_exc);
|
|
DISPATCH();
|
|
}
|
|
if (ret_kind == MP_VM_RETURN_EXCEPTION) {
|
|
// Pop exhausted gen
|
|
sp--;
|
|
if (EXC_MATCH(ret_value, MP_OBJ_FROM_PTR(&mp_type_StopIteration))) {
|
|
PUSH(mp_obj_exception_get_value(ret_value));
|
|
// If we injected GeneratorExit downstream, then even
|
|
// if it was swallowed, we re-raise GeneratorExit
|
|
GENERATOR_EXIT_IF_NEEDED(t_exc);
|
|
DISPATCH();
|
|
} else {
|
|
RAISE(ret_value);
|
|
}
|
|
}
|
|
}
|
|
|
|
ENTRY(MP_BC_IMPORT_NAME): {
|
|
MARK_EXC_IP_SELECTIVE();
|
|
DECODE_QSTR;
|
|
mp_obj_t obj = POP();
|
|
SET_TOP(mp_import_name(qst, obj, TOP()));
|
|
DISPATCH();
|
|
}
|
|
|
|
ENTRY(MP_BC_IMPORT_FROM): {
|
|
MARK_EXC_IP_SELECTIVE();
|
|
DECODE_QSTR;
|
|
mp_obj_t obj = mp_import_from(TOP(), qst);
|
|
PUSH(obj);
|
|
DISPATCH();
|
|
}
|
|
|
|
ENTRY(MP_BC_IMPORT_STAR):
|
|
MARK_EXC_IP_SELECTIVE();
|
|
mp_import_all(POP());
|
|
DISPATCH();
|
|
|
|
#if MICROPY_OPT_COMPUTED_GOTO
|
|
ENTRY(MP_BC_LOAD_CONST_SMALL_INT_MULTI):
|
|
PUSH(MP_OBJ_NEW_SMALL_INT((mp_int_t)ip[-1] - MP_BC_LOAD_CONST_SMALL_INT_MULTI - 16));
|
|
DISPATCH();
|
|
|
|
ENTRY(MP_BC_LOAD_FAST_MULTI):
|
|
obj_shared = fastn[MP_BC_LOAD_FAST_MULTI - (mp_int_t)ip[-1]];
|
|
goto load_check;
|
|
|
|
ENTRY(MP_BC_STORE_FAST_MULTI):
|
|
fastn[MP_BC_STORE_FAST_MULTI - (mp_int_t)ip[-1]] = POP();
|
|
DISPATCH();
|
|
|
|
ENTRY(MP_BC_UNARY_OP_MULTI):
|
|
MARK_EXC_IP_SELECTIVE();
|
|
SET_TOP(mp_unary_op(ip[-1] - MP_BC_UNARY_OP_MULTI, TOP()));
|
|
DISPATCH();
|
|
|
|
ENTRY(MP_BC_BINARY_OP_MULTI): {
|
|
MARK_EXC_IP_SELECTIVE();
|
|
mp_obj_t rhs = POP();
|
|
mp_obj_t lhs = TOP();
|
|
SET_TOP(mp_binary_op(ip[-1] - MP_BC_BINARY_OP_MULTI, lhs, rhs));
|
|
DISPATCH();
|
|
}
|
|
|
|
ENTRY_DEFAULT:
|
|
MARK_EXC_IP_SELECTIVE();
|
|
#else
|
|
ENTRY_DEFAULT:
|
|
if (ip[-1] < MP_BC_LOAD_CONST_SMALL_INT_MULTI + 64) {
|
|
PUSH(MP_OBJ_NEW_SMALL_INT((mp_int_t)ip[-1] - MP_BC_LOAD_CONST_SMALL_INT_MULTI - 16));
|
|
DISPATCH();
|
|
} else if (ip[-1] < MP_BC_LOAD_FAST_MULTI + 16) {
|
|
obj_shared = fastn[MP_BC_LOAD_FAST_MULTI - (mp_int_t)ip[-1]];
|
|
goto load_check;
|
|
} else if (ip[-1] < MP_BC_STORE_FAST_MULTI + 16) {
|
|
fastn[MP_BC_STORE_FAST_MULTI - (mp_int_t)ip[-1]] = POP();
|
|
DISPATCH();
|
|
} else if (ip[-1] < MP_BC_UNARY_OP_MULTI + 7) {
|
|
SET_TOP(mp_unary_op(ip[-1] - MP_BC_UNARY_OP_MULTI, TOP()));
|
|
DISPATCH();
|
|
} else if (ip[-1] < MP_BC_BINARY_OP_MULTI + 36) {
|
|
mp_obj_t rhs = POP();
|
|
mp_obj_t lhs = TOP();
|
|
SET_TOP(mp_binary_op(ip[-1] - MP_BC_BINARY_OP_MULTI, lhs, rhs));
|
|
DISPATCH();
|
|
} else
|
|
#endif
|
|
{
|
|
mp_obj_t obj = mp_obj_new_exception_msg(&mp_type_NotImplementedError, "byte code not implemented");
|
|
nlr_pop();
|
|
fastn[0] = obj;
|
|
return MP_VM_RETURN_EXCEPTION;
|
|
}
|
|
|
|
#if !MICROPY_OPT_COMPUTED_GOTO
|
|
} // switch
|
|
#endif
|
|
|
|
pending_exception_check:
|
|
MICROPY_VM_HOOK_LOOP
|
|
|
|
#if MICROPY_ENABLE_SCHEDULER
|
|
// This is an inlined variant of mp_handle_pending
|
|
if (MP_STATE_VM(sched_state) == MP_SCHED_PENDING) {
|
|
MARK_EXC_IP_SELECTIVE();
|
|
mp_uint_t atomic_state = MICROPY_BEGIN_ATOMIC_SECTION();
|
|
mp_obj_t obj = MP_STATE_VM(mp_pending_exception);
|
|
if (obj != MP_OBJ_NULL) {
|
|
MP_STATE_VM(mp_pending_exception) = MP_OBJ_NULL;
|
|
if (!mp_sched_num_pending()) {
|
|
MP_STATE_VM(sched_state) = MP_SCHED_IDLE;
|
|
}
|
|
MICROPY_END_ATOMIC_SECTION(atomic_state);
|
|
RAISE(obj);
|
|
}
|
|
mp_handle_pending_tail(atomic_state);
|
|
}
|
|
#else
|
|
// This is an inlined variant of mp_handle_pending
|
|
if (MP_STATE_VM(mp_pending_exception) != MP_OBJ_NULL) {
|
|
MARK_EXC_IP_SELECTIVE();
|
|
mp_obj_t obj = MP_STATE_VM(mp_pending_exception);
|
|
MP_STATE_VM(mp_pending_exception) = MP_OBJ_NULL;
|
|
RAISE(obj);
|
|
}
|
|
#endif
|
|
|
|
#if MICROPY_PY_THREAD_GIL
|
|
#if MICROPY_PY_THREAD_GIL_VM_DIVISOR
|
|
if (--gil_divisor == 0) {
|
|
gil_divisor = MICROPY_PY_THREAD_GIL_VM_DIVISOR;
|
|
#else
|
|
{
|
|
#endif
|
|
#if MICROPY_ENABLE_SCHEDULER
|
|
// can only switch threads if the scheduler is unlocked
|
|
if (MP_STATE_VM(sched_state) == MP_SCHED_IDLE)
|
|
#endif
|
|
{
|
|
MP_THREAD_GIL_EXIT();
|
|
MP_THREAD_GIL_ENTER();
|
|
}
|
|
}
|
|
#endif
|
|
|
|
} // for loop
|
|
|
|
} else {
|
|
exception_handler:
|
|
// exception occurred
|
|
|
|
#if MICROPY_PY_SYS_EXC_INFO
|
|
MP_STATE_VM(cur_exception) = nlr.ret_val;
|
|
#endif
|
|
|
|
#if SELECTIVE_EXC_IP
|
|
// with selective ip, we store the ip 1 byte past the opcode, so move ptr back
|
|
code_state->ip -= 1;
|
|
#endif
|
|
|
|
if (mp_obj_is_subclass_fast(MP_OBJ_FROM_PTR(((mp_obj_base_t*)nlr.ret_val)->type), MP_OBJ_FROM_PTR(&mp_type_StopIteration))) {
|
|
if (code_state->ip) {
|
|
// check if it's a StopIteration within a for block
|
|
if (*code_state->ip == MP_BC_FOR_ITER) {
|
|
const byte *ip = code_state->ip + 1;
|
|
DECODE_ULABEL; // the jump offset if iteration finishes; for labels are always forward
|
|
code_state->ip = ip + ulab; // jump to after for-block
|
|
code_state->sp -= MP_OBJ_ITER_BUF_NSLOTS; // pop the exhausted iterator
|
|
goto outer_dispatch_loop; // continue with dispatch loop
|
|
} else if (*code_state->ip == MP_BC_YIELD_FROM) {
|
|
// StopIteration inside yield from call means return a value of
|
|
// yield from, so inject exception's value as yield from's result
|
|
*++code_state->sp = mp_obj_exception_get_value(MP_OBJ_FROM_PTR(nlr.ret_val));
|
|
code_state->ip++; // yield from is over, move to next instruction
|
|
goto outer_dispatch_loop; // continue with dispatch loop
|
|
}
|
|
}
|
|
}
|
|
|
|
#if MICROPY_STACKLESS
|
|
unwind_loop:
|
|
#endif
|
|
// set file and line number that the exception occurred at
|
|
// TODO: don't set traceback for exceptions re-raised by END_FINALLY.
|
|
// But consider how to handle nested exceptions.
|
|
// TODO need a better way of not adding traceback to constant objects (right now, just GeneratorExit_obj and MemoryError_obj)
|
|
if (nlr.ret_val != &mp_const_GeneratorExit_obj && nlr.ret_val != &mp_const_MemoryError_obj) {
|
|
const byte *ip = code_state->fun_bc->bytecode;
|
|
mp_decode_uint(&ip); // skip n_state
|
|
mp_decode_uint(&ip); // skip n_exc_stack
|
|
ip++; // skip scope_params
|
|
ip++; // skip n_pos_args
|
|
ip++; // skip n_kwonly_args
|
|
ip++; // skip n_def_pos_args
|
|
size_t bc = code_state->ip - ip;
|
|
size_t code_info_size = mp_decode_uint(&ip);
|
|
bc -= code_info_size;
|
|
#if MICROPY_PERSISTENT_CODE
|
|
qstr block_name = ip[0] | (ip[1] << 8);
|
|
qstr source_file = ip[2] | (ip[3] << 8);
|
|
ip += 4;
|
|
#else
|
|
qstr block_name = mp_decode_uint(&ip);
|
|
qstr source_file = mp_decode_uint(&ip);
|
|
#endif
|
|
size_t source_line = 1;
|
|
size_t c;
|
|
while ((c = *ip)) {
|
|
size_t b, l;
|
|
if ((c & 0x80) == 0) {
|
|
// 0b0LLBBBBB encoding
|
|
b = c & 0x1f;
|
|
l = c >> 5;
|
|
ip += 1;
|
|
} else {
|
|
// 0b1LLLBBBB 0bLLLLLLLL encoding (l's LSB in second byte)
|
|
b = c & 0xf;
|
|
l = ((c << 4) & 0x700) | ip[1];
|
|
ip += 2;
|
|
}
|
|
if (bc >= b) {
|
|
bc -= b;
|
|
source_line += l;
|
|
} else {
|
|
// found source line corresponding to bytecode offset
|
|
break;
|
|
}
|
|
}
|
|
mp_obj_exception_add_traceback(MP_OBJ_FROM_PTR(nlr.ret_val), source_file, source_line, block_name);
|
|
}
|
|
|
|
while (currently_in_except_block) {
|
|
// nested exception
|
|
|
|
assert(exc_sp >= exc_stack);
|
|
|
|
// TODO make a proper message for nested exception
|
|
// at the moment we are just raising the very last exception (the one that caused the nested exception)
|
|
|
|
// move up to previous exception handler
|
|
POP_EXC_BLOCK();
|
|
}
|
|
|
|
if (exc_sp >= exc_stack) {
|
|
// set flag to indicate that we are now handling an exception
|
|
currently_in_except_block = 1;
|
|
|
|
// catch exception and pass to byte code
|
|
code_state->ip = exc_sp->handler;
|
|
mp_obj_t *sp = MP_TAGPTR_PTR(exc_sp->val_sp);
|
|
// save this exception in the stack so it can be used in a reraise, if needed
|
|
exc_sp->prev_exc = nlr.ret_val;
|
|
// push exception object so it can be handled by bytecode
|
|
PUSH(MP_OBJ_FROM_PTR(nlr.ret_val));
|
|
code_state->sp = sp;
|
|
|
|
#if MICROPY_STACKLESS
|
|
} else if (code_state->prev != NULL) {
|
|
mp_globals_set(code_state->old_globals);
|
|
code_state = code_state->prev;
|
|
size_t n_state = mp_decode_uint_value(code_state->fun_bc->bytecode);
|
|
fastn = &code_state->state[n_state - 1];
|
|
exc_stack = (mp_exc_stack_t*)(code_state->state + n_state);
|
|
// variables that are visible to the exception handler (declared volatile)
|
|
currently_in_except_block = MP_TAGPTR_TAG0(code_state->exc_sp); // 0 or 1, to detect nested exceptions
|
|
exc_sp = MP_TAGPTR_PTR(code_state->exc_sp); // stack grows up, exc_sp points to top of stack
|
|
goto unwind_loop;
|
|
|
|
#endif
|
|
} else {
|
|
// propagate exception to higher level
|
|
// TODO what to do about ip and sp? they don't really make sense at this point
|
|
fastn[0] = MP_OBJ_FROM_PTR(nlr.ret_val); // must put exception here because sp is invalid
|
|
return MP_VM_RETURN_EXCEPTION;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|