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1692cad673
circuitpython/py/showbc.c
Damien George 1692cad673 py/showbc: Remove global variables and make DECODE_PTR work correctly. 
The bytecode state variables mp_showbc_code_start and mp_showbc_constants
have been removed and made local variables passed into the various
functions.

As part of this, the DECODE_PTR macro is fixed so it extracts the relevant
pointer from the child_table (a regression introduced in
f2040bfc7e).

Signed-off-by: Damien George <damien@micropython.org>
2022-03-16 11:59:46 +11:00

543 lines
17 KiB
C
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/*
* This file is part of the MicroPython project, http://micropython.org/
*
* The MIT License (MIT)
*
* Copyright (c) 2013, 2014 Damien P. George
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include <stdio.h>
#include <assert.h>
#include "py/bc0.h"
#include "py/emitglue.h"
#if MICROPY_DEBUG_PRINTERS
#define DECODE_UINT { \
unum = 0; \
do { \
unum = (unum << 7) + (*ip & 0x7f); \
} while ((*ip++ & 0x80) != 0); \
}
#define DECODE_ULABEL do { unum = (ip[0] | (ip[1] << 8)); ip += 2; } while (0)
#define DECODE_SLABEL do { unum = (ip[0] | (ip[1] << 8)) - 0x8000; ip += 2; } while (0)
#if MICROPY_EMIT_BYTECODE_USES_QSTR_TABLE
#define DECODE_QSTR \
DECODE_UINT; \
qst = qstr_table[unum]
#else
#define DECODE_QSTR \
DECODE_UINT; \
qst = unum;
#endif
#define DECODE_PTR \
DECODE_UINT; \
unum = (mp_uint_t)(uintptr_t)child_table[unum]
#define DECODE_OBJ \
DECODE_UINT; \
unum = (mp_uint_t)obj_table[unum]
void mp_bytecode_print(const mp_print_t *print, const mp_raw_code_t *rc, const mp_module_constants_t *cm) {
const byte *ip_start = rc->fun_data;
const byte *ip = rc->fun_data;
// Decode prelude
MP_BC_PRELUDE_SIG_DECODE(ip);
MP_BC_PRELUDE_SIZE_DECODE(ip);
const byte *code_info = ip;
qstr block_name = mp_decode_uint(&code_info);
#if MICROPY_EMIT_BYTECODE_USES_QSTR_TABLE
block_name = cm->qstr_table[block_name];
qstr source_file = cm->qstr_table[0];
#else
qstr source_file = cm->source_file;
#endif
mp_printf(print, "File %s, code block '%s' (descriptor: %p, bytecode @%p %u bytes)\n",
qstr_str(source_file), qstr_str(block_name), rc, ip_start, (unsigned)rc->fun_data_len);
// raw bytecode dump
size_t prelude_size = ip - ip_start + n_info + n_cell;
mp_printf(print, "Raw bytecode (code_info_size=%u, bytecode_size=%u):\n",
(unsigned)prelude_size, (unsigned)(rc->fun_data_len - prelude_size));
for (size_t i = 0; i < rc->fun_data_len; i++) {
if (i > 0 && i % 16 == 0) {
mp_printf(print, "\n");
}
mp_printf(print, " %02x", ip_start[i]);
}
mp_printf(print, "\n");
// bytecode prelude: arg names (as qstr objects)
mp_printf(print, "arg names:");
for (mp_uint_t i = 0; i < n_pos_args + n_kwonly_args; i++) {
qstr qst = mp_decode_uint(&code_info);
#if MICROPY_EMIT_BYTECODE_USES_QSTR_TABLE
qst = cm->qstr_table[qst];
#endif
mp_printf(print, " %s", qstr_str(qst));
}
mp_printf(print, "\n");
mp_printf(print, "(N_STATE %u)\n", (unsigned)n_state);
mp_printf(print, "(N_EXC_STACK %u)\n", (unsigned)n_exc_stack);
// skip over code_info
ip += n_info;
const byte *line_info_top = ip;
// bytecode prelude: initialise closed over variables
for (size_t i = 0; i < n_cell; ++i) {
uint local_num = *ip++;
mp_printf(print, "(INIT_CELL %u)\n", local_num);
}
// print out line number info
{
mp_int_t bc = 0;
mp_uint_t source_line = 1;
mp_printf(print, " bc=" INT_FMT " line=" UINT_FMT "\n", bc, source_line);
for (const byte *ci = code_info; ci < line_info_top;) {
if ((ci[0] & 0x80) == 0) {
// 0b0LLBBBBB encoding
bc += ci[0] & 0x1f;
source_line += ci[0] >> 5;
ci += 1;
} else {
// 0b1LLLBBBB 0bLLLLLLLL encoding (l's LSB in second byte)
bc += ci[0] & 0xf;
source_line += ((ci[0] << 4) & 0x700) | ci[1];
ci += 2;
}
mp_printf(print, " bc=" INT_FMT " line=" UINT_FMT "\n", bc, source_line);
}
}
mp_bytecode_print2(print, ip, rc->fun_data_len - prelude_size, rc->children, cm);
}
const byte *mp_bytecode_print_str(const mp_print_t *print, const byte *ip_start, const byte *ip, mp_raw_code_t *const *child_table, const mp_module_constants_t *cm) {
#if MICROPY_EMIT_BYTECODE_USES_QSTR_TABLE
const qstr_short_t *qstr_table = cm->qstr_table;
#endif
const mp_obj_t *obj_table = cm->obj_table;
mp_uint_t unum;
qstr qst;
switch (*ip++) {
case MP_BC_LOAD_CONST_FALSE:
mp_printf(print, "LOAD_CONST_FALSE");
break;
case MP_BC_LOAD_CONST_NONE:
mp_printf(print, "LOAD_CONST_NONE");
break;
case MP_BC_LOAD_CONST_TRUE:
mp_printf(print, "LOAD_CONST_TRUE");
break;
case MP_BC_LOAD_CONST_SMALL_INT: {
mp_int_t num = 0;
if ((ip[0] & 0x40) != 0) {
// Number is negative
num--;
}
do {
num = ((mp_uint_t)num << 7) | (*ip & 0x7f);
} while ((*ip++ & 0x80) != 0);
mp_printf(print, "LOAD_CONST_SMALL_INT " INT_FMT, num);
break;
}
case MP_BC_LOAD_CONST_STRING:
DECODE_QSTR;
mp_printf(print, "LOAD_CONST_STRING '%s'", qstr_str(qst));
break;
case MP_BC_LOAD_CONST_OBJ:
DECODE_OBJ;
mp_printf(print, "LOAD_CONST_OBJ %p=", MP_OBJ_TO_PTR(unum));
mp_obj_print_helper(print, (mp_obj_t)unum, PRINT_REPR);
break;
case MP_BC_LOAD_NULL:
mp_printf(print, "LOAD_NULL");
break;
case MP_BC_LOAD_FAST_N:
DECODE_UINT;
mp_printf(print, "LOAD_FAST_N " UINT_FMT, unum);
break;
case MP_BC_LOAD_DEREF:
DECODE_UINT;
mp_printf(print, "LOAD_DEREF " UINT_FMT, unum);
break;
case MP_BC_LOAD_NAME:
DECODE_QSTR;
mp_printf(print, "LOAD_NAME %s", qstr_str(qst));
break;
case MP_BC_LOAD_GLOBAL:
DECODE_QSTR;
mp_printf(print, "LOAD_GLOBAL %s", qstr_str(qst));
break;
case MP_BC_LOAD_ATTR:
DECODE_QSTR;
mp_printf(print, "LOAD_ATTR %s", qstr_str(qst));
break;
case MP_BC_LOAD_METHOD:
DECODE_QSTR;
mp_printf(print, "LOAD_METHOD %s", qstr_str(qst));
break;
case MP_BC_LOAD_SUPER_METHOD:
DECODE_QSTR;
mp_printf(print, "LOAD_SUPER_METHOD %s", qstr_str(qst));
break;
case MP_BC_LOAD_BUILD_CLASS:
mp_printf(print, "LOAD_BUILD_CLASS");
break;
case MP_BC_LOAD_SUBSCR:
mp_printf(print, "LOAD_SUBSCR");
break;
case MP_BC_STORE_FAST_N:
DECODE_UINT;
mp_printf(print, "STORE_FAST_N " UINT_FMT, unum);
break;
case MP_BC_STORE_DEREF:
DECODE_UINT;
mp_printf(print, "STORE_DEREF " UINT_FMT, unum);
break;
case MP_BC_STORE_NAME:
DECODE_QSTR;
mp_printf(print, "STORE_NAME %s", qstr_str(qst));
break;
case MP_BC_STORE_GLOBAL:
DECODE_QSTR;
mp_printf(print, "STORE_GLOBAL %s", qstr_str(qst));
break;
case MP_BC_STORE_ATTR:
DECODE_QSTR;
mp_printf(print, "STORE_ATTR %s", qstr_str(qst));
break;
case MP_BC_STORE_SUBSCR:
mp_printf(print, "STORE_SUBSCR");
break;
case MP_BC_DELETE_FAST:
DECODE_UINT;
mp_printf(print, "DELETE_FAST " UINT_FMT, unum);
break;
case MP_BC_DELETE_DEREF:
DECODE_UINT;
mp_printf(print, "DELETE_DEREF " UINT_FMT, unum);
break;
case MP_BC_DELETE_NAME:
DECODE_QSTR;
mp_printf(print, "DELETE_NAME %s", qstr_str(qst));
break;
case MP_BC_DELETE_GLOBAL:
DECODE_QSTR;
mp_printf(print, "DELETE_GLOBAL %s", qstr_str(qst));
break;
case MP_BC_DUP_TOP:
mp_printf(print, "DUP_TOP");
break;
case MP_BC_DUP_TOP_TWO:
mp_printf(print, "DUP_TOP_TWO");
break;
case MP_BC_POP_TOP:
mp_printf(print, "POP_TOP");
break;
case MP_BC_ROT_TWO:
mp_printf(print, "ROT_TWO");
break;
case MP_BC_ROT_THREE:
mp_printf(print, "ROT_THREE");
break;
case MP_BC_JUMP:
DECODE_SLABEL;
mp_printf(print, "JUMP " UINT_FMT, (mp_uint_t)(ip + unum - ip_start));
break;
case MP_BC_POP_JUMP_IF_TRUE:
DECODE_SLABEL;
mp_printf(print, "POP_JUMP_IF_TRUE " UINT_FMT, (mp_uint_t)(ip + unum - ip_start));
break;
case MP_BC_POP_JUMP_IF_FALSE:
DECODE_SLABEL;
mp_printf(print, "POP_JUMP_IF_FALSE " UINT_FMT, (mp_uint_t)(ip + unum - ip_start));
break;
case MP_BC_JUMP_IF_TRUE_OR_POP:
DECODE_SLABEL;
mp_printf(print, "JUMP_IF_TRUE_OR_POP " UINT_FMT, (mp_uint_t)(ip + unum - ip_start));
break;
case MP_BC_JUMP_IF_FALSE_OR_POP:
DECODE_SLABEL;
mp_printf(print, "JUMP_IF_FALSE_OR_POP " UINT_FMT, (mp_uint_t)(ip + unum - ip_start));
break;
case MP_BC_SETUP_WITH:
DECODE_ULABEL; // loop-like labels are always forward
mp_printf(print, "SETUP_WITH " UINT_FMT, (mp_uint_t)(ip + unum - ip_start));
break;
case MP_BC_WITH_CLEANUP:
mp_printf(print, "WITH_CLEANUP");
break;
case MP_BC_UNWIND_JUMP:
DECODE_SLABEL;
mp_printf(print, "UNWIND_JUMP " UINT_FMT " %d", (mp_uint_t)(ip + unum - ip_start), *ip);
ip += 1;
break;
case MP_BC_SETUP_EXCEPT:
DECODE_ULABEL; // except labels are always forward
mp_printf(print, "SETUP_EXCEPT " UINT_FMT, (mp_uint_t)(ip + unum - ip_start));
break;
case MP_BC_SETUP_FINALLY:
DECODE_ULABEL; // except labels are always forward
mp_printf(print, "SETUP_FINALLY " UINT_FMT, (mp_uint_t)(ip + unum - ip_start));
break;
case MP_BC_END_FINALLY:
// if TOS is an exception, reraises the exception (3 values on TOS)
// if TOS is an integer, does something else
// if TOS is None, just pops it and continues
// else error
mp_printf(print, "END_FINALLY");
break;
case MP_BC_GET_ITER:
mp_printf(print, "GET_ITER");
break;
case MP_BC_GET_ITER_STACK:
mp_printf(print, "GET_ITER_STACK");
break;
case MP_BC_FOR_ITER:
DECODE_ULABEL; // the jump offset if iteration finishes; for labels are always forward
mp_printf(print, "FOR_ITER " UINT_FMT, (mp_uint_t)(ip + unum - ip_start));
break;
case MP_BC_POP_EXCEPT_JUMP:
DECODE_ULABEL; // these labels are always forward
mp_printf(print, "POP_EXCEPT_JUMP " UINT_FMT, (mp_uint_t)(ip + unum - ip_start));
break;
case MP_BC_BUILD_TUPLE:
DECODE_UINT;
mp_printf(print, "BUILD_TUPLE " UINT_FMT, unum);
break;
case MP_BC_BUILD_LIST:
DECODE_UINT;
mp_printf(print, "BUILD_LIST " UINT_FMT, unum);
break;
case MP_BC_BUILD_MAP:
DECODE_UINT;
mp_printf(print, "BUILD_MAP " UINT_FMT, unum);
break;
case MP_BC_STORE_MAP:
mp_printf(print, "STORE_MAP");
break;
case MP_BC_BUILD_SET:
DECODE_UINT;
mp_printf(print, "BUILD_SET " UINT_FMT, unum);
break;
#if MICROPY_PY_BUILTINS_SLICE
case MP_BC_BUILD_SLICE:
DECODE_UINT;
mp_printf(print, "BUILD_SLICE " UINT_FMT, unum);
break;
#endif
case MP_BC_STORE_COMP:
DECODE_UINT;
mp_printf(print, "STORE_COMP " UINT_FMT, unum);
break;
case MP_BC_UNPACK_SEQUENCE:
DECODE_UINT;
mp_printf(print, "UNPACK_SEQUENCE " UINT_FMT, unum);
break;
case MP_BC_UNPACK_EX:
DECODE_UINT;
mp_printf(print, "UNPACK_EX " UINT_FMT, unum);
break;
case MP_BC_MAKE_FUNCTION:
DECODE_PTR;
mp_printf(print, "MAKE_FUNCTION %p", (void *)(uintptr_t)unum);
break;
case MP_BC_MAKE_FUNCTION_DEFARGS:
DECODE_PTR;
mp_printf(print, "MAKE_FUNCTION_DEFARGS %p", (void *)(uintptr_t)unum);
break;
case MP_BC_MAKE_CLOSURE: {
DECODE_PTR;
mp_uint_t n_closed_over = *ip++;
mp_printf(print, "MAKE_CLOSURE %p " UINT_FMT, (void *)(uintptr_t)unum, n_closed_over);
break;
}
case MP_BC_MAKE_CLOSURE_DEFARGS: {
DECODE_PTR;
mp_uint_t n_closed_over = *ip++;
mp_printf(print, "MAKE_CLOSURE_DEFARGS %p " UINT_FMT, (void *)(uintptr_t)unum, n_closed_over);
break;
}
case MP_BC_CALL_FUNCTION:
DECODE_UINT;
mp_printf(print, "CALL_FUNCTION n=" UINT_FMT " nkw=" UINT_FMT, unum & 0xff, (unum >> 8) & 0xff);
break;
case MP_BC_CALL_FUNCTION_VAR_KW:
DECODE_UINT;
mp_printf(print, "CALL_FUNCTION_VAR_KW n=" UINT_FMT " nkw=" UINT_FMT, unum & 0xff, (unum >> 8) & 0xff);
break;
case MP_BC_CALL_METHOD:
DECODE_UINT;
mp_printf(print, "CALL_METHOD n=" UINT_FMT " nkw=" UINT_FMT, unum & 0xff, (unum >> 8) & 0xff);
break;
case MP_BC_CALL_METHOD_VAR_KW:
DECODE_UINT;
mp_printf(print, "CALL_METHOD_VAR_KW n=" UINT_FMT " nkw=" UINT_FMT, unum & 0xff, (unum >> 8) & 0xff);
break;
case MP_BC_RETURN_VALUE:
mp_printf(print, "RETURN_VALUE");
break;
case MP_BC_RAISE_LAST:
mp_printf(print, "RAISE_LAST");
break;
case MP_BC_RAISE_OBJ:
mp_printf(print, "RAISE_OBJ");
break;
case MP_BC_RAISE_FROM:
mp_printf(print, "RAISE_FROM");
break;
case MP_BC_YIELD_VALUE:
mp_printf(print, "YIELD_VALUE");
break;
case MP_BC_YIELD_FROM:
mp_printf(print, "YIELD_FROM");
break;
case MP_BC_IMPORT_NAME:
DECODE_QSTR;
mp_printf(print, "IMPORT_NAME '%s'", qstr_str(qst));
break;
case MP_BC_IMPORT_FROM:
DECODE_QSTR;
mp_printf(print, "IMPORT_FROM '%s'", qstr_str(qst));
break;
case MP_BC_IMPORT_STAR:
mp_printf(print, "IMPORT_STAR");
break;
default:
if (ip[-1] < MP_BC_LOAD_CONST_SMALL_INT_MULTI + 64) {
mp_printf(print, "LOAD_CONST_SMALL_INT " INT_FMT, (mp_int_t)ip[-1] - MP_BC_LOAD_CONST_SMALL_INT_MULTI - 16);
} else if (ip[-1] < MP_BC_LOAD_FAST_MULTI + 16) {
mp_printf(print, "LOAD_FAST " UINT_FMT, (mp_uint_t)ip[-1] - MP_BC_LOAD_FAST_MULTI);
} else if (ip[-1] < MP_BC_STORE_FAST_MULTI + 16) {
mp_printf(print, "STORE_FAST " UINT_FMT, (mp_uint_t)ip[-1] - MP_BC_STORE_FAST_MULTI);
} else if (ip[-1] < MP_BC_UNARY_OP_MULTI + MP_UNARY_OP_NUM_BYTECODE) {
mp_uint_t op = ip[-1] - MP_BC_UNARY_OP_MULTI;
mp_printf(print, "UNARY_OP " UINT_FMT " %s", op, qstr_str(mp_unary_op_method_name[op]));
} else if (ip[-1] < MP_BC_BINARY_OP_MULTI + MP_BINARY_OP_NUM_BYTECODE) {
mp_uint_t op = ip[-1] - MP_BC_BINARY_OP_MULTI;
mp_printf(print, "BINARY_OP " UINT_FMT " %s", op, qstr_str(mp_binary_op_method_name[op]));
} else {
mp_printf(print, "code %p, byte code 0x%02x not implemented\n", ip - 1, ip[-1]);
assert(0);
return ip;
}
break;
}
return ip;
}
void mp_bytecode_print2(const mp_print_t *print, const byte *ip, size_t len, mp_raw_code_t *const *child_table, const mp_module_constants_t *cm) {
const byte *ip_start = ip;
while (ip < ip_start + len) {
mp_printf(print, "%02u ", (uint)(ip - ip_start));
ip = mp_bytecode_print_str(print, ip_start, ip, child_table, cm);
mp_printf(print, "\n");
}
}
#endif // MICROPY_DEBUG_PRINTERS
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