95 lines
3.7 KiB
C
95 lines
3.7 KiB
C
/*
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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) 2020 Scott Shawcroft for Adafruit Industries
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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 "shared-bindings/memorymonitor/__init__.h"
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#include "shared-bindings/memorymonitor/AllocationAlarm.h"
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#include "py/gc.h"
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#include "py/mpstate.h"
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#include "py/runtime.h"
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void common_hal_memorymonitor_allocationalarm_construct(memorymonitor_allocationalarm_obj_t *self, size_t minimum_block_count) {
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self->minimum_block_count = minimum_block_count;
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self->next = NULL;
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self->previous = NULL;
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}
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void common_hal_memorymonitor_allocationalarm_set_ignore(memorymonitor_allocationalarm_obj_t *self, mp_int_t count) {
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self->count = count;
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}
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void common_hal_memorymonitor_allocationalarm_pause(memorymonitor_allocationalarm_obj_t *self) {
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// Check to make sure we aren't already paused. We can be if we're exiting from an exception we
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// caused.
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if (self->previous == NULL) {
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return;
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}
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*self->previous = self->next;
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self->next = NULL;
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self->previous = NULL;
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}
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void common_hal_memorymonitor_allocationalarm_resume(memorymonitor_allocationalarm_obj_t *self) {
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if (self->previous != NULL) {
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mp_raise_RuntimeError(MP_ERROR_TEXT("Already running"));
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}
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self->next = MP_STATE_VM(active_allocationalarms);
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self->previous = (memorymonitor_allocationalarm_obj_t **)&MP_STATE_VM(active_allocationalarms);
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if (self->next != NULL) {
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self->next->previous = &self->next;
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}
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MP_STATE_VM(active_allocationalarms) = self;
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}
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void memorymonitor_allocationalarms_allocation(size_t block_count) {
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memorymonitor_allocationalarm_obj_t *alarm = MP_OBJ_TO_PTR(MP_STATE_VM(active_allocationalarms));
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size_t alert_count = 0;
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while (alarm != NULL) {
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// Hold onto next in case we remove the alarm from the list.
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memorymonitor_allocationalarm_obj_t *next = alarm->next;
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if (block_count >= alarm->minimum_block_count) {
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if (alarm->count > 0) {
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alarm->count--;
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} else {
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// Uncomment the breakpoint below if you want to use a C debugger to figure out the C
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// call stack for an allocation.
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// asm("bkpt");
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// Pause now because we may alert when throwing the exception too.
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common_hal_memorymonitor_allocationalarm_pause(alarm);
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alert_count++;
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}
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}
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alarm = next;
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}
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if (alert_count > 0) {
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mp_raise_memorymonitor_AllocationError(MP_ERROR_TEXT("Attempt to allocate %d blocks"), block_count);
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}
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}
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void memorymonitor_allocationalarms_reset(void) {
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MP_STATE_VM(active_allocationalarms) = NULL;
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}
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