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/*
* This file is part of the MicroPython project, http://micropython.org/
*
* Development of the code in this file was sponsored by Microbric Pty Ltd
*
* The MIT License (MIT)
*
* Copyright (c) 2014 Damien P. George
* Copyright (c) 2017 Pycom Limited
*
* 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 "py/mpconfig.h"
#include "py/mpstate.h"
#include "py/gc.h"
#include "py/mpthread.h"
#include "gccollect.h"
#if CONFIG_IDF_TARGET_ARCH_XTENSA
#include "xtensa/hal.h"
// The level argument must be volatile to force the compiler to emit code that
// will call this function recursively, to nest the C stack.
static void gc_collect_inner(volatile unsigned int level) {
if (level < XCHAL_NUM_AREGS / 8) {
// Go deeper on the stack to spill more registers from the register window.
gc_collect_inner(level + 1);
} else {
// Deep enough so that all registers are on the C stack, now trace the stack.
volatile uint32_t sp = (uint32_t)esp_cpu_get_sp();
gc_collect_root((void **)sp, ((mp_uint_t)MP_STATE_THREAD(stack_top) - sp) / sizeof(uint32_t));
}
}
void gc_collect(void) {
gc_collect_start();
gc_collect_inner(0);
#if MICROPY_PY_THREAD
mp_thread_gc_others();
#endif
gc_collect_end();
}
#elif CONFIG_IDF_TARGET_ARCH_RISCV
#include "shared/runtime/gchelper.h"
void gc_collect(void) {
gc_collect_start();
gc_helper_collect_regs_and_stack();
#if MICROPY_PY_THREAD
mp_thread_gc_others();
#endif
gc_collect_end();
}
#else
#error unknown CONFIG_IDF_TARGET_ARCH
#endif
#if MICROPY_GC_SPLIT_HEAP_AUTO
// The largest new region that is available to become Python heap is the largest
// free block in the ESP-IDF system heap.
size_t gc_get_max_new_split(void) {
return heap_caps_get_largest_free_block(MALLOC_CAP_DEFAULT);
}
#endif
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