From f91493c97e20eef1d39a9cdc6c42a25cfd511734 Mon Sep 17 00:00:00 2001 From: Dan Halbert Date: Sun, 23 Jul 2017 15:32:05 -0400 Subject: Measure and report maximum stack usage. (#175) Add max stack usage tracking, visible via debug module ustack. Add separate cpp flag for enabling modules: MICROPY_DEBUG_MODULES --- shared-module/ustack/__init__.c | 52 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 52 insertions(+) create mode 100644 shared-module/ustack/__init__.c (limited to 'shared-module') diff --git a/shared-module/ustack/__init__.c b/shared-module/ustack/__init__.c new file mode 100644 index 000000000..947f81f8e --- /dev/null +++ b/shared-module/ustack/__init__.c @@ -0,0 +1,52 @@ +/* + * This file is part of the MicroPython project, http://micropython.org/ + * + * The MIT License (MIT) + * + * Copyright (c) 2017 Dan Halbert + * + * 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 + +#include "py/mpstate.h" +#include "py/stackctrl.h" + +#include "shared-bindings/ustack/__init__.h" + +#if MICROPY_MAX_STACK_USAGE +uint32_t shared_module_ustack_max_stack_usage(void) { + // Start at stack limit and move up. + // Untouched stack was filled with a sentinel value. + // Stop at first non-sentinel byte. + char* p = MP_STATE_THREAD(stack_bottom); + while (*p++ == MP_MAX_STACK_USAGE_SENTINEL_BYTE) { } + return MP_STATE_THREAD(stack_top) - p; +} +#endif + +uint32_t shared_module_ustack_stack_size() { + return MP_STATE_THREAD(stack_limit); +} + +uint32_t shared_module_ustack_stack_usage() { + return mp_stack_usage(); +} + -- cgit v1.2.3