b84f60cab3
The helper for analyzing (fiber) stack usage is in no way specific to Bluetooth and will likely be of use to many other places as well. Move it therefore to include/misc. Change-Id: Iedb699dbe248aca305e387998d37bb339cfb0e21 Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
74 lines
2.1 KiB
C
74 lines
2.1 KiB
C
/**
|
|
* @file stack.h
|
|
* Stack usage analysis helpers
|
|
*/
|
|
|
|
/*
|
|
* Copyright (c) 2015 Intel Corporation
|
|
*
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
|
* you may not use this file except in compliance with the License.
|
|
* You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
* See the License for the specific language governing permissions and
|
|
* limitations under the License.
|
|
*/
|
|
|
|
#if defined(CONFIG_INIT_STACKS) && defined(CONFIG_PRINTK)
|
|
#include <offsets.h>
|
|
#include <misc/printk.h>
|
|
|
|
static inline void stack_analyze(const char *name, const char *stack,
|
|
unsigned size)
|
|
{
|
|
unsigned i, stack_offset, pcnt, unused = 0;
|
|
|
|
/* The TCS is always placed on a 4-byte aligned boundary - if
|
|
* the stack beginning doesn't match that there will be some
|
|
* unused bytes in the beginning.
|
|
*/
|
|
stack_offset = __tTCS_SIZEOF + ((4 - ((unsigned)stack % 4)) % 4);
|
|
|
|
/* TODO
|
|
* Currently all supported platforms have stack growth down and there is no
|
|
* Kconfig option to configure it so this always build "else" branch.
|
|
* When support for platform with stack direction up (or configurable direction)
|
|
* is added this check should be confirmed that correct Kconfig option is used.
|
|
*/
|
|
#if defined(CONFIG_STACK_GROWS_UP)
|
|
for (i = size - 1; i >= stack_offset; i--) {
|
|
if ((unsigned char)stack[i] == 0xaa) {
|
|
unused++;
|
|
} else {
|
|
break;
|
|
}
|
|
}
|
|
#else
|
|
for (i = stack_offset; i < size; i++) {
|
|
if ((unsigned char)stack[i] == 0xaa) {
|
|
unused++;
|
|
} else {
|
|
break;
|
|
}
|
|
}
|
|
#endif
|
|
|
|
/* Calculate the real size reserved for the stack */
|
|
size -= stack_offset;
|
|
pcnt = ((size - unused) * 100) / size;
|
|
|
|
printk("%s (real size %u):\tunused %u\tusage %u / %u (%u %%)\n", name,
|
|
size + stack_offset, unused, size - unused, size, pcnt);
|
|
}
|
|
#else
|
|
static inline void stack_analyze(const char *name, const char *stack,
|
|
unsigned size)
|
|
{
|
|
}
|
|
#endif
|