py/profile: Add initial implementation of sys.settrace feature.
This commit is contained in:
Milan Rossa
Damien George
parent
dbf35d3da3
commit
c96aedad46
441
py/profile.c
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441
py/profile.c
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@ -0,0 +1,441 @@
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/*
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* This file is part of the MicroPython 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) SatoshiLabs
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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 "py/profile.h"
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#include "py/bc0.h"
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#include "py/gc.h"
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#if MICROPY_PY_SYS_SETTRACE
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#define prof_trace_cb MP_STATE_THREAD(prof_trace_callback)
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STATIC uint mp_prof_bytecode_lineno(const mp_raw_code_t *rc, size_t bc) {
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const mp_bytecode_prelude_t *prelude = &rc->prelude;
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return mp_bytecode_get_source_line(prelude->line_info, bc + prelude->opcodes - prelude->locals);
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}
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void mp_prof_extract_prelude(const byte *bytecode, mp_bytecode_prelude_t *prelude) {
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const byte *ip = bytecode;
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prelude->n_state = mp_decode_uint(&ip);
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prelude->n_exc_stack = mp_decode_uint(&ip);
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prelude->scope_flags = *ip++;
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prelude->n_pos_args = *ip++;
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prelude->n_kwonly_args = *ip++;
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prelude->n_def_pos_args = *ip++;
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const byte *code_info = ip;
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size_t code_info_size = mp_decode_uint(&ip);
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qstr block_name = ip[0] | (ip[1] << 8);
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qstr source_file = ip[2] | (ip[3] << 8);
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ip += 4;
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prelude->qstr_block_name = block_name;
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prelude->qstr_source_file = source_file;
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prelude->line_info = ip;
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prelude->locals = code_info + code_info_size;
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ip = prelude->locals;
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while (*ip++ != 255) {
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}
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prelude->opcodes = ip;
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}
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/******************************************************************************/
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// code object
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STATIC void code_print(const mp_print_t *print, mp_obj_t o_in, mp_print_kind_t kind) {
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(void)kind;
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mp_obj_code_t *o = MP_OBJ_TO_PTR(o_in);
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const mp_raw_code_t *rc = o->rc;
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const mp_bytecode_prelude_t *prelude = &rc->prelude;
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mp_printf(print,
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"<code object %q at 0x%p, file \"%q\", line %d>",
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prelude->qstr_block_name,
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o,
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prelude->qstr_source_file,
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rc->line_of_definition
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);
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}
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STATIC mp_obj_tuple_t* code_consts(const mp_raw_code_t *rc) {
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const mp_bytecode_prelude_t *prelude = &rc->prelude;
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int start = prelude->n_pos_args + prelude->n_kwonly_args + rc->n_obj;
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int stop = prelude->n_pos_args + prelude->n_kwonly_args + rc->n_obj + rc->n_raw_code;
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mp_obj_tuple_t *consts = MP_OBJ_TO_PTR(mp_obj_new_tuple(stop - start + 1, NULL));
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size_t const_no = 0;
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for (int i = start; i < stop; ++i) {
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mp_obj_t code = mp_obj_new_code((const mp_raw_code_t*)MP_OBJ_TO_PTR(rc->const_table[i]));
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if (code == MP_OBJ_NULL) {
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m_malloc_fail(sizeof(mp_obj_code_t));
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}
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consts->items[const_no++] = code;
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}
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consts->items[const_no++] = mp_const_none;
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return consts;
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}
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STATIC mp_obj_t raw_code_lnotab(const mp_raw_code_t *rc) {
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// const mp_bytecode_prelude_t *prelude = &rc->prelude;
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uint start = 0;
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uint stop = rc->fun_data_len - start;
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uint last_lineno = mp_prof_bytecode_lineno(rc, start);
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uint lasti = 0;
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const uint buffer_chunk_size = (stop-start) >> 2; // heuristic magic
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uint buffer_size = buffer_chunk_size;
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byte *buffer = m_new(byte, buffer_size);
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uint buffer_index = 0;
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for (uint i = start; i < stop; ++i) {
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uint lineno = mp_prof_bytecode_lineno(rc, i);
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size_t line_diff = lineno - last_lineno;
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if (line_diff > 0) {
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uint instr_diff = (i - start) - lasti;
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assert(instr_diff < 256);
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assert(line_diff < 256);
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if (buffer_index + 2 > buffer_size) {
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buffer = m_renew(byte, buffer, buffer_size, buffer_size + buffer_chunk_size);
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buffer_size = buffer_size + buffer_chunk_size;
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}
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last_lineno = lineno;
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lasti = i - start;
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buffer[buffer_index++] = instr_diff;
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buffer[buffer_index++] = line_diff;
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}
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}
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mp_obj_t o = mp_obj_new_bytes(buffer, buffer_index);
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m_del(byte, buffer, buffer_size);
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return o;
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}
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STATIC void code_attr(mp_obj_t self_in, qstr attr, mp_obj_t *dest) {
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if (dest[0] != MP_OBJ_NULL) {
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// not load attribute
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return;
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}
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mp_obj_code_t *o = MP_OBJ_TO_PTR(self_in);
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const mp_raw_code_t *rc = o->rc;
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const mp_bytecode_prelude_t *prelude = &rc->prelude;
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switch(attr) {
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case MP_QSTR_co_code:
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dest[0] = mp_obj_new_bytes(
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(void*)prelude->opcodes,
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rc->fun_data_len - (prelude->opcodes - (const byte*)rc->fun_data)
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);
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break;
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case MP_QSTR_co_consts:
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dest[0] = MP_OBJ_FROM_PTR(code_consts(rc));
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break;
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case MP_QSTR_co_filename:
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dest[0] = MP_OBJ_NEW_QSTR(prelude->qstr_source_file);
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break;
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case MP_QSTR_co_firstlineno:
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dest[0] = MP_OBJ_NEW_SMALL_INT(mp_prof_bytecode_lineno(rc, 0));
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break;
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case MP_QSTR_co_name:
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dest[0] = MP_OBJ_NEW_QSTR(prelude->qstr_block_name);
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break;
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case MP_QSTR_co_names:
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dest[0] = MP_OBJ_FROM_PTR(o->dict_locals);
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break;
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case MP_QSTR_co_lnotab:
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if (!o->lnotab) {
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o->lnotab = raw_code_lnotab(rc);
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}
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dest[0] = o->lnotab;
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break;
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}
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}
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const mp_obj_type_t mp_type_code = {
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{ &mp_type_type },
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.name = MP_QSTR_code,
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.print = code_print,
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.unary_op = mp_generic_unary_op,
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.attr = code_attr,
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};
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mp_obj_t mp_obj_new_code(const mp_raw_code_t *rc) {
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mp_obj_code_t *o = m_new_obj_maybe(mp_obj_code_t);
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if (o == NULL) {
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return MP_OBJ_NULL;
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}
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o->base.type = &mp_type_code;
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o->rc = rc;
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o->dict_locals = mp_locals_get(); // this is a wrong! how to do this properly?
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o->lnotab = MP_OBJ_NULL;
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return MP_OBJ_FROM_PTR(o);
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}
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/******************************************************************************/
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// frame object
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STATIC void frame_print(const mp_print_t *print, mp_obj_t o_in, mp_print_kind_t kind) {
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(void)kind;
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mp_obj_frame_t *frame = MP_OBJ_TO_PTR(o_in);
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mp_obj_code_t *code = frame->code;
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const mp_raw_code_t *rc = code->rc;
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const mp_bytecode_prelude_t *prelude = &rc->prelude;
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mp_printf(print,
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"<frame at 0x%p, file '%q', line %d, code %q>",
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frame,
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prelude->qstr_source_file,
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frame->lineno,
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prelude->qstr_block_name
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);
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}
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STATIC void frame_attr(mp_obj_t self_in, qstr attr, mp_obj_t *dest) {
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if (dest[0] != MP_OBJ_NULL) {
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// not load attribute
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return;
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}
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mp_obj_frame_t *o = MP_OBJ_TO_PTR(self_in);
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switch(attr) {
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case MP_QSTR_f_back:
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dest[0] = mp_const_none;
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if (o->code_state->prev_state) {
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dest[0] = MP_OBJ_FROM_PTR(o->code_state->prev_state->frame);
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}
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break;
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case MP_QSTR_f_code:
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dest[0] = MP_OBJ_FROM_PTR(o->code);
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break;
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case MP_QSTR_f_globals:
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dest[0] = MP_OBJ_FROM_PTR(o->code_state->fun_bc->globals);
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break;
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case MP_QSTR_f_lasti:
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dest[0] = MP_OBJ_NEW_SMALL_INT(o->lasti);
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break;
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case MP_QSTR_f_lineno:
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dest[0] = MP_OBJ_NEW_SMALL_INT(o->lineno);
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break;
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}
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}
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const mp_obj_type_t mp_type_frame = {
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{ &mp_type_type },
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.name = MP_QSTR_frame,
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.print = frame_print,
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.unary_op = mp_generic_unary_op,
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.attr = frame_attr,
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};
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mp_obj_t mp_obj_new_frame(const mp_code_state_t *code_state) {
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if (gc_is_locked()) {
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return MP_OBJ_NULL;
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}
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mp_obj_frame_t *o = m_new_obj_maybe(mp_obj_frame_t);
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if (o == NULL) {
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return MP_OBJ_NULL;
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}
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mp_obj_code_t *code = o->code = MP_OBJ_TO_PTR(mp_obj_new_code(code_state->fun_bc->rc));
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if (code == NULL) {
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return MP_OBJ_NULL;
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}
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const mp_raw_code_t *rc = code->rc;
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const mp_bytecode_prelude_t *prelude = &rc->prelude;
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o->code_state = code_state;
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o->base.type = &mp_type_frame;
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o->back = NULL;
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o->code = code;
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o->lasti = code_state->ip - prelude->opcodes;
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o->lineno = mp_prof_bytecode_lineno(rc, o->lasti);
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o->trace_opcodes = false;
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o->callback = MP_OBJ_NULL;
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return MP_OBJ_FROM_PTR(o);
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}
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/******************************************************************************/
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// Trace logic
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typedef struct {
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struct _mp_obj_frame_t * frame;
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mp_obj_t event;
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mp_obj_t arg;
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} prof_callback_args_t;
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STATIC mp_obj_t mp_prof_callback_invoke(mp_obj_t callback, prof_callback_args_t *args) {
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assert(mp_obj_is_callable(callback));
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mp_prof_is_executing = true;
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mp_obj_t a[3] = {MP_OBJ_FROM_PTR(args->frame), args->event, args->arg};
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mp_obj_t top = mp_call_function_n_kw(callback, 3, 0, a);
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mp_prof_is_executing = false;
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if (MP_STATE_VM(mp_pending_exception) != MP_OBJ_NULL) {
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mp_obj_t obj = MP_STATE_VM(mp_pending_exception);
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MP_STATE_VM(mp_pending_exception) = MP_OBJ_NULL;
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nlr_raise(obj);
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}
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return top;
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}
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mp_obj_t mp_prof_settrace(mp_obj_t callback) {
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if (mp_obj_is_callable(callback)) {
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prof_trace_cb = callback;
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} else {
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prof_trace_cb = MP_OBJ_NULL;
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}
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return mp_const_none;
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}
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mp_obj_t mp_prof_frame_enter(mp_code_state_t *code_state) {
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assert(!mp_prof_is_executing);
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mp_obj_frame_t *frame = MP_OBJ_TO_PTR(mp_obj_new_frame(code_state));
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if (frame == NULL) {
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// Couldn't allocate a frame object
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return MP_OBJ_NULL;
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}
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if (code_state->prev_state && code_state->frame == NULL) {
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// We are entering not-yet-traced frame
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// which means it's a CALL event (not a GENERATOR)
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// so set the function definition line.
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const mp_raw_code_t *rc = code_state->fun_bc->rc;
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frame->lineno = rc->line_of_definition;
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if (!rc->line_of_definition) {
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frame->lineno = mp_prof_bytecode_lineno(rc, 0);
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}
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}
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code_state->frame = frame;
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if (!prof_trace_cb) {
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return MP_OBJ_NULL;
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}
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mp_obj_t top;
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prof_callback_args_t _args, *args=&_args;
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args->frame = code_state->frame;
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// SETTRACE event CALL
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args->event = MP_OBJ_NEW_QSTR(MP_QSTR_call);
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args->arg = mp_const_none;
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top = mp_prof_callback_invoke(prof_trace_cb, args);
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code_state->frame->callback = mp_obj_is_callable(top) ? top : MP_OBJ_NULL;
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// Invalidate the last executed line number so the LINE trace can trigger after this CALL.
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frame->lineno = 0;
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return top;
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}
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mp_obj_t mp_prof_frame_update(const mp_code_state_t *code_state) {
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mp_obj_frame_t *frame = code_state->frame;
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if (frame == NULL) {
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// Frame was not allocated (eg because there was no memory available)
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return MP_OBJ_NULL;
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}
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mp_obj_frame_t *o = frame;
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mp_obj_code_t *code = o->code;
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const mp_raw_code_t *rc = code->rc;
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const mp_bytecode_prelude_t *prelude = &rc->prelude;
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assert(o->code_state == code_state);
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o->lasti = code_state->ip - prelude->opcodes;
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o->lineno = mp_prof_bytecode_lineno(rc, o->lasti);
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return MP_OBJ_FROM_PTR(o);
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}
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mp_obj_t mp_prof_instr_tick(mp_code_state_t *code_state, bool is_exception) {
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// Detect execution recursion
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assert(!mp_prof_is_executing);
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assert(code_state->frame);
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assert(mp_obj_get_type(code_state->frame) == &mp_type_frame);
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// Detect data recursion
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assert(code_state != code_state->prev_state);
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mp_obj_t top = mp_const_none;
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mp_obj_t callback = code_state->frame->callback;
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prof_callback_args_t _args, *args=&_args;
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args->frame = code_state->frame;
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args->event = mp_const_none;
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args->arg = mp_const_none;
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// Call event's are handled inside mp_prof_frame_enter
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// SETTRACE event EXCEPTION
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if (is_exception) {
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args->event = MP_OBJ_NEW_QSTR(MP_QSTR_exception);
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top = mp_prof_callback_invoke(callback, args);
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return top;
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}
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// SETTRACE event LINE
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const mp_raw_code_t *rc = code_state->fun_bc->rc;
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const mp_bytecode_prelude_t *prelude = &rc->prelude;
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size_t prev_line_no = args->frame->lineno;
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size_t current_line_no = mp_prof_bytecode_lineno(rc, code_state->ip - prelude->opcodes);
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if (prev_line_no != current_line_no) {
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args->frame->lineno = current_line_no;
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args->event = MP_OBJ_NEW_QSTR(MP_QSTR_line);
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top = mp_prof_callback_invoke(callback, args);
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}
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// SETTRACE event RETURN
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const byte *ip = code_state->ip;
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if (*ip == MP_BC_RETURN_VALUE || *ip == MP_BC_YIELD_VALUE) {
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args->event = MP_OBJ_NEW_QSTR(MP_QSTR_return);
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top = mp_prof_callback_invoke(callback, args);
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if (code_state->prev_state && *ip == MP_BC_RETURN_VALUE) {
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code_state->frame->callback = MP_OBJ_NULL;
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}
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}
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// SETTRACE event OPCODE
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// TODO: frame.f_trace_opcodes=True
|
||||
if (false) {
|
||||
args->event = MP_OBJ_NEW_QSTR(MP_QSTR_opcode);
|
||||
}
|
||||
|
||||
return top;
|
||||
}
|
||||
|
||||
#endif // MICROPY_PY_SYS_SETTRACE
|
||||
69
py/profile.h
Normal file
69
py/profile.h
Normal file
@ -0,0 +1,69 @@
|
||||
/*
|
||||
* This file is part of the MicroPython project, http://micropython.org/
|
||||
*
|
||||
* The MIT License (MIT)
|
||||
*
|
||||
* Copyright (c) SatoshiLabs
|
||||
*
|
||||
* 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.
|
||||
*/
|
||||
|
||||
#ifndef MICROPY_INCLUDED_PY_PROFILING_H
|
||||
#define MICROPY_INCLUDED_PY_PROFILING_H
|
||||
|
||||
#include "py/emitglue.h"
|
||||
|
||||
#if MICROPY_PY_SYS_SETTRACE
|
||||
|
||||
#define mp_prof_is_executing MP_STATE_THREAD(prof_callback_is_executing)
|
||||
|
||||
typedef struct _mp_obj_code_t {
|
||||
mp_obj_base_t base;
|
||||
const mp_raw_code_t *rc;
|
||||
mp_obj_dict_t *dict_locals;
|
||||
mp_obj_t lnotab;
|
||||
} mp_obj_code_t;
|
||||
|
||||
typedef struct _mp_obj_frame_t {
|
||||
mp_obj_base_t base;
|
||||
const mp_code_state_t *code_state;
|
||||
struct _mp_obj_frame_t *back;
|
||||
mp_obj_t callback;
|
||||
mp_obj_code_t *code;
|
||||
mp_uint_t lasti;
|
||||
mp_uint_t lineno;
|
||||
bool trace_opcodes;
|
||||
} mp_obj_frame_t;
|
||||
|
||||
void mp_prof_extract_prelude(const byte *bytecode, mp_bytecode_prelude_t *prelude);
|
||||
|
||||
mp_obj_t mp_obj_new_code(const mp_raw_code_t *rc);
|
||||
mp_obj_t mp_obj_new_frame(const mp_code_state_t *code_state);
|
||||
|
||||
// This is the implementation for the sys.settrace
|
||||
mp_obj_t mp_prof_settrace(mp_obj_t callback);
|
||||
|
||||
mp_obj_t mp_prof_frame_enter(mp_code_state_t *code_state);
|
||||
mp_obj_t mp_prof_frame_update(const mp_code_state_t *code_state);
|
||||
|
||||
// For every VM instruction tick this function deduces events from the state
|
||||
mp_obj_t mp_prof_instr_tick(mp_code_state_t *code_state, bool is_exception);
|
||||
|
||||
#endif // MICROPY_PY_SYS_SETTRACE
|
||||
#endif // MICROPY_INCLUDED_PY_PROFILING_H
|
||||
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Reference in New Issue
Block a user