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f6ca7de09c
There was a lot of duplication between architectures for the definition of threads and the "nanokernel" guts. These have been consolidated. Now, a common file kernel/unified/include/kernel_structs.h holds the common definitions. Architectures provide two files to complement it: kernel_arch_data.h and kernel_arch_func.h. The first one contains at least the struct _thread_arch and struct _kernel_arch data structures, as well as the struct _callee_saved and struct _caller_saved register layouts. The second file contains anything that needs what is provided by the common stuff in kernel_structs.h. Those two files are only meant to be included in kernel_structs.h in very specific locations. The thread data structure has been separated into three major parts: common struct _thread_base and struct k_thread, and arch-specific struct _thread_arch. The first and third ones are included in the second. The struct s_NANO data structure has been split into two: common struct _kernel and arch-specific struct _kernel_arch. The latter is included in the former. Offsets files have also changed: nano_offsets.h has been renamed kernel_offsets.h and is still included by the arch-specific offsets.c. Also, since the thread and kernel data structures are now made of sub-structures, offsets have to be added to make up the full offset. Some of these additions have been consolidated in shorter symbols, available from kernel/unified/include/offsets_short.h, which includes an arch-specific offsets_arch_short.h. Most of the code include offsets_short.h now instead of offsets.h. Change-Id: I084645cb7e6db8db69aeaaf162963fe157045d5a Signed-off-by: Benjamin Walsh <benjamin.walsh@windriver.com>
74 lines
2.1 KiB
C
74 lines
2.1 KiB
C
/**
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* @file stack.h
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* Stack usage analysis helpers
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*/
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/*
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* Copyright (c) 2015 Intel Corporation
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#if defined(CONFIG_INIT_STACKS) && defined(CONFIG_PRINTK)
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#include <offsets.h>
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#include <misc/printk.h>
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static inline void stack_analyze(const char *name, const char *stack,
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unsigned size)
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{
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unsigned i, stack_offset, pcnt, unused = 0;
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/* The TCS is always placed on a 4-byte aligned boundary - if
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* the stack beginning doesn't match that there will be some
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* unused bytes in the beginning.
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*/
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stack_offset = K_THREAD_SIZEOF + ((4 - ((unsigned)stack % 4)) % 4);
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/* TODO
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* Currently all supported platforms have stack growth down and there is no
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* Kconfig option to configure it so this always build "else" branch.
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* When support for platform with stack direction up (or configurable direction)
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* is added this check should be confirmed that correct Kconfig option is used.
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*/
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#if defined(CONFIG_STACK_GROWS_UP)
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for (i = size - 1; i >= stack_offset; i--) {
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if ((unsigned char)stack[i] == 0xaa) {
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unused++;
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} else {
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break;
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}
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}
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#else
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for (i = stack_offset; i < size; i++) {
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if ((unsigned char)stack[i] == 0xaa) {
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unused++;
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} else {
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break;
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}
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}
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#endif
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/* Calculate the real size reserved for the stack */
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size -= stack_offset;
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pcnt = ((size - unused) * 100) / size;
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printk("%s (real size %u):\tunused %u\tusage %u / %u (%u %%)\n", name,
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size + stack_offset, unused, size - unused, size, pcnt);
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}
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#else
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static inline void stack_analyze(const char *name, const char *stack,
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unsigned size)
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{
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}
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#endif
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