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Diffstat (limited to 'thirdparty/nRF5_SDK_15.0.0_a53641a/components/libraries/balloc/nrf_balloc.c')
| -rw-r--r-- | thirdparty/nRF5_SDK_15.0.0_a53641a/components/libraries/balloc/nrf_balloc.c | 399 |
1 files changed, 399 insertions, 0 deletions
diff --git a/thirdparty/nRF5_SDK_15.0.0_a53641a/components/libraries/balloc/nrf_balloc.c b/thirdparty/nRF5_SDK_15.0.0_a53641a/components/libraries/balloc/nrf_balloc.c new file mode 100644 index 0000000..d228f32 --- /dev/null +++ b/thirdparty/nRF5_SDK_15.0.0_a53641a/components/libraries/balloc/nrf_balloc.c @@ -0,0 +1,399 @@ +/** + * Copyright (c) 2016 - 2018, Nordic Semiconductor ASA + * + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, this + * list of conditions and the following disclaimer. + * + * 2. Redistributions in binary form, except as embedded into a Nordic + * Semiconductor ASA integrated circuit in a product or a software update for + * such product, must reproduce the above copyright notice, this list of + * conditions and the following disclaimer in the documentation and/or other + * materials provided with the distribution. + * + * 3. Neither the name of Nordic Semiconductor ASA nor the names of its + * contributors may be used to endorse or promote products derived from this + * software without specific prior written permission. + * + * 4. This software, with or without modification, must only be used with a + * Nordic Semiconductor ASA integrated circuit. + * + * 5. Any software provided in binary form under this license must not be reverse + * engineered, decompiled, modified and/or disassembled. + * + * THIS SOFTWARE IS PROVIDED BY NORDIC SEMICONDUCTOR ASA "AS IS" AND ANY EXPRESS + * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES + * OF MERCHANTABILITY, NONINFRINGEMENT, AND FITNESS FOR A PARTICULAR PURPOSE ARE + * DISCLAIMED. IN NO EVENT SHALL NORDIC SEMICONDUCTOR ASA OR CONTRIBUTORS BE + * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE + * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT + * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + */ +#include "sdk_common.h" + #if NRF_MODULE_ENABLED(NRF_BALLOC) + +#include "nrf_section.h" +#include "nrf_balloc.h" +#include "app_util_platform.h" + + +#if NRF_BALLOC_CONFIG_LOG_ENABLED + #define NRF_LOG_LEVEL NRF_BALLOC_CONFIG_LOG_LEVEL + #define NRF_LOG_INITIAL_LEVEL NRF_BALLOC_CONFIG_INITIAL_LOG_LEVEL + #define NRF_LOG_INFO_COLOR NRF_BALLOC_CONFIG_INFO_COLOR + #define NRF_LOG_DEBUG_COLOR NRF_BALLOC_CONFIG_DEBUG_COLOR +#else + #define NRF_LOG_LEVEL 0 +#endif // NRF_BALLOC_CONFIG_LOG_ENABLED +#include "nrf_log.h" + +#define HEAD_GUARD_FILL 0xBAADF00D /**< Magic number used to mark head guard.*/ +#define TAIL_GUARD_FILL 0xBAADCAFE /**< Magic number used to mark tail guard.*/ +#define FREE_MEM_FILL 0xBAADBAAD /**< Magic number used to mark free memory.*/ + +#if NRF_BALLOC_CONFIG_DEBUG_ENABLED +#define POOL_ID(_p_pool) _p_pool->p_name +#define POOL_MARKER "%s" +#else +#define POOL_ID(_p_pool) _p_pool +#define POOL_MARKER "0x%08X" +#endif + +NRF_SECTION_DEF(nrf_balloc, nrf_balloc_t); + +#if NRF_BALLOC_CLI_CMDS +#include "nrf_cli.h" + +static void nrf_balloc_status(nrf_cli_t const * p_cli, size_t argc, char **argv) +{ + UNUSED_PARAMETER(argv); + + if (nrf_cli_help_requested(p_cli)) + { + nrf_cli_help_print(p_cli, NULL, 0); + return; + } + + if (argc > 1) + { + nrf_cli_fprintf(p_cli, NRF_CLI_ERROR, "Bad argument count"); + return; + } + + uint32_t num_of_instances = NRF_SECTION_ITEM_COUNT(nrf_balloc, nrf_balloc_t); + uint32_t i; + + for (i = 0; i < num_of_instances; i++) + { + const nrf_balloc_t * p_instance = NRF_SECTION_ITEM_GET(nrf_balloc, nrf_balloc_t, i); + + uint32_t element_size = NRF_BALLOC_ELEMENT_SIZE(p_instance); + uint32_t dbg_addon = p_instance->block_size - element_size; + uint32_t pool_size = p_instance->p_stack_limit - p_instance->p_stack_base; + uint32_t max_util = nrf_balloc_max_utilization_get(p_instance); + uint32_t util = nrf_balloc_utilization_get(p_instance); + const char * p_name = p_instance->p_name; + nrf_cli_fprintf(p_cli, NRF_CLI_NORMAL, + "%s\r\n\t- Element size:\t%d + %d bytes of debug information\r\n" + "\t- Usage:\t%u%% (%u out of %u elements)\r\n" + "\t- Maximum:\t%u%% (%u out of %u elements)\r\n\r\n", + p_name, element_size, dbg_addon, + 100ul * util/pool_size, util,pool_size, + 100ul * max_util/pool_size, max_util,pool_size); + + } +} +// Register "balloc" command and its subcommands in CLI. +NRF_CLI_CREATE_STATIC_SUBCMD_SET(nrf_balloc_commands) +{ + NRF_CLI_CMD(status, NULL, "Print status of balloc instances.", nrf_balloc_status), + NRF_CLI_SUBCMD_SET_END +}; + +NRF_CLI_CMD_REGISTER(balloc, &nrf_balloc_commands, "Commands for BALLOC management", nrf_balloc_status); +#endif //NRF_BALLOC_CLI_CMDS + +#if NRF_BALLOC_CONFIG_DEBUG_ENABLED +/**@brief Validate block memory, prepare block guards, and calculate pointer to the element. + * + * @param[in] p_pool Pointer to the memory pool. + * @param[in] p_head Pointer to the beginning of the block. + * + * @return Pointer to the element. + */ +__STATIC_INLINE void * nrf_balloc_block_unwrap(nrf_balloc_t const * p_pool, void * p_head) +{ + ASSERT((p_pool != NULL) && ((p_pool->block_size % sizeof(uint32_t)) == 0)); + ASSERT((p_head != NULL) && (((uint32_t)(p_head) % sizeof(uint32_t)) == 0)); + + uint32_t head_words = NRF_BALLOC_DEBUG_HEAD_GUARD_WORDS_GET(p_pool->debug_flags); + uint32_t tail_words = NRF_BALLOC_DEBUG_TAIL_GUARD_WORDS_GET(p_pool->debug_flags); + + uint32_t * p_tail = (uint32_t *)((size_t)(p_head) + p_pool->block_size); + uint32_t * p_element = (uint32_t *)p_head + head_words; + + if (NRF_BALLOC_DEBUG_DATA_TRASHING_CHECK_GET(p_pool->debug_flags)) + { + for (uint32_t * ptr = p_head; ptr < p_tail; ptr++) + { + if (*ptr != FREE_MEM_FILL) + { + NRF_LOG_INST_ERROR(p_pool->p_log, + "Detected free memory corruption at 0x%08X (0x%08X != 0x%08X)", + ptr, *ptr, FREE_MEM_FILL); + APP_ERROR_CHECK_BOOL(false); + } + } + } + + for (uint32_t * ptr = p_head; ptr < p_element; ptr++) + { + *ptr = HEAD_GUARD_FILL; + } + + for (uint32_t * ptr = ( p_tail - tail_words); ptr < p_tail; ptr++) + { + *ptr = TAIL_GUARD_FILL; + } + + return p_element; +} + +/**@brief Calculate pointer to the block, validate block guards, and mark block memory as free. + * + * @param[in] p_pool Pointer to the memory pool. + * @param[in] p_element Pointer to the element. + * + * @return Pointer to the beginning of the block. + */ +__STATIC_INLINE void * nrf_balloc_element_wrap(nrf_balloc_t const * p_pool, void * p_element) +{ + ASSERT((p_pool != NULL) && ((p_pool->block_size % sizeof(uint32_t)) == 0)); + ASSERT((p_element != NULL) && (((uint32_t)(p_element) % sizeof(uint32_t)) == 0)); + + uint32_t head_words = NRF_BALLOC_DEBUG_HEAD_GUARD_WORDS_GET(p_pool->debug_flags); + uint32_t tail_words = NRF_BALLOC_DEBUG_TAIL_GUARD_WORDS_GET(p_pool->debug_flags); + + uint32_t * p_head = (uint32_t *)p_element - head_words; + uint32_t * p_tail = (uint32_t *)((size_t)(p_head) + p_pool->block_size); + + for (uint32_t * ptr = p_head; ptr < (uint32_t *)p_element; ptr++) + { + if (*ptr != HEAD_GUARD_FILL) + { + NRF_LOG_INST_ERROR(p_pool->p_log, + "Detected Head Guard corruption at 0x%08X (0x%08X != 0x%08X)", + ptr, *ptr, HEAD_GUARD_FILL); + APP_ERROR_CHECK_BOOL(false); + } + } + + for (uint32_t * ptr = ( p_tail - tail_words); ptr < p_tail; ptr++) + { + if (*ptr != TAIL_GUARD_FILL) + { + NRF_LOG_INST_ERROR(p_pool->p_log, + "Detected Tail Guard corruption at 0x%08X (0x%08X != 0x%08X)", + ptr, *ptr, TAIL_GUARD_FILL); + APP_ERROR_CHECK_BOOL(false); + } + } + + if (NRF_BALLOC_DEBUG_DATA_TRASHING_CHECK_GET(p_pool->debug_flags)) + { + for (uint32_t * ptr = p_head; ptr < p_tail; ptr++) + { + *ptr = FREE_MEM_FILL; + } + } + + return p_head; +} + +#endif // NRF_BALLOC_CONFIG_DEBUG_ENABLED + +/**@brief Convert block index to a pointer. + * + * @param[in] p_pool Pointer to the memory pool. + * @param[in] idx Index of the block. + * + * @return Pointer to the beginning of the block. + */ +static void * nrf_balloc_idx2block(nrf_balloc_t const * p_pool, uint8_t idx) +{ + ASSERT(p_pool != NULL); + return (uint8_t *)(p_pool->p_memory_begin) + ((size_t)(idx) * p_pool->block_size); +} + +/**@brief Convert block pointer to index. + * + * @param[in] p_pool Pointer to the memory pool. + * @param[in] p_block Pointer to the beginning of the block. + * + * @return Index of the block. + */ +static uint8_t nrf_balloc_block2idx(nrf_balloc_t const * p_pool, void const * p_block) +{ + ASSERT(p_pool != NULL); + return ((size_t)(p_block) - (size_t)(p_pool->p_memory_begin)) / p_pool->block_size; +} + +ret_code_t nrf_balloc_init(nrf_balloc_t const * p_pool) +{ + uint8_t pool_size; + + VERIFY_PARAM_NOT_NULL(p_pool); + + ASSERT(p_pool->p_cb); + ASSERT(p_pool->p_stack_base); + ASSERT(p_pool->p_stack_limit); + ASSERT(p_pool->p_memory_begin); + ASSERT(p_pool->block_size); + + pool_size = p_pool->p_stack_limit - p_pool->p_stack_base; + +#if NRF_BALLOC_CONFIG_DEBUG_ENABLED + void *p_memory_end = (uint8_t *)(p_pool->p_memory_begin) + (pool_size * p_pool->block_size); + if (NRF_BALLOC_DEBUG_DATA_TRASHING_CHECK_GET(p_pool->debug_flags)) + { + for (uint32_t * ptr = p_pool->p_memory_begin; ptr < (uint32_t *)(p_memory_end); ptr++) + { + *ptr = FREE_MEM_FILL; + } + } +#endif + + NRF_LOG_INST_INFO(p_pool->p_log, "Initialized (size: %u x %u = %u bytes)", + pool_size, + p_pool->block_size, + pool_size * p_pool->block_size); + + p_pool->p_cb->p_stack_pointer = p_pool->p_stack_base; + while (pool_size--) + { + *(p_pool->p_cb->p_stack_pointer)++ = pool_size; + } + + p_pool->p_cb->max_utilization = 0; + + return NRF_SUCCESS; +} + +void * nrf_balloc_alloc(nrf_balloc_t const * p_pool) +{ + ASSERT(p_pool != NULL); + + void * p_block = NULL; + + CRITICAL_REGION_ENTER(); + + if (p_pool->p_cb->p_stack_pointer > p_pool->p_stack_base) + { + // Allocate block. + p_block = nrf_balloc_idx2block(p_pool, *--(p_pool->p_cb->p_stack_pointer)); + + // Update utilization statistics. + uint8_t utilization = p_pool->p_stack_limit - p_pool->p_cb->p_stack_pointer; + if (p_pool->p_cb->max_utilization < utilization) + { + p_pool->p_cb->max_utilization = utilization; + } + } + + CRITICAL_REGION_EXIT(); + +#if NRF_BALLOC_CONFIG_DEBUG_ENABLED + if (p_block != NULL) + { + p_block = nrf_balloc_block_unwrap(p_pool, p_block); + } +#endif + + NRF_LOG_INST_DEBUG(p_pool->p_log, "Allocating element: 0x%08X", p_block); + + return p_block; +} + +void nrf_balloc_free(nrf_balloc_t const * p_pool, void * p_element) +{ + ASSERT(p_pool != NULL); + ASSERT(p_element != NULL) + + NRF_LOG_INST_DEBUG(p_pool->p_log, "Freeing element: 0x%08X", p_element); + +#if NRF_BALLOC_CONFIG_DEBUG_ENABLED + void * p_block = nrf_balloc_element_wrap(p_pool, p_element); + + // These checks could be done outside critical region as they use only pool configuration data. + if (NRF_BALLOC_DEBUG_BASIC_CHECKS_GET(p_pool->debug_flags)) + { + uint8_t pool_size = p_pool->p_stack_limit - p_pool->p_stack_base; + void *p_memory_end = (uint8_t *)(p_pool->p_memory_begin) + (pool_size * p_pool->block_size); + + // Check if the element belongs to this pool. + if ((p_block < p_pool->p_memory_begin) || (p_block >= p_memory_end)) + { + NRF_LOG_INST_ERROR(p_pool->p_log, + "Attempted to free element (0x%08X) that does not belong to the pool.", + p_element); + APP_ERROR_CHECK_BOOL(false); + } + + // Check if the pointer is valid. + if ((((size_t)(p_block) - (size_t)(p_pool->p_memory_begin)) % p_pool->block_size) != 0) + { + NRF_LOG_INST_ERROR(p_pool->p_log, + "Attempted to free corrupted element address (0x%08X).", p_element); + APP_ERROR_CHECK_BOOL(false); + } + } +#else + void * p_block = p_element; +#endif // NRF_BALLOC_CONFIG_DEBUG_ENABLED + + CRITICAL_REGION_ENTER(); + +#if NRF_BALLOC_CONFIG_DEBUG_ENABLED + // These checks have to be done in critical region as they use p_pool->p_stack_pointer. + if (NRF_BALLOC_DEBUG_BASIC_CHECKS_GET(p_pool->debug_flags)) + { + // Check for allocated/free ballance. + if (p_pool->p_cb->p_stack_pointer >= p_pool->p_stack_limit) + { + NRF_LOG_INST_ERROR(p_pool->p_log, + "Attempted to free an element (0x%08X) while the pool is full.", + p_element); + APP_ERROR_CHECK_BOOL(false); + } + } + + if (NRF_BALLOC_DEBUG_DOUBLE_FREE_CHECK_GET(p_pool->debug_flags)) + { + // Check for double free. + for (uint8_t * p_idx = p_pool->p_stack_base; p_idx < p_pool->p_cb->p_stack_pointer; p_idx++) + { + if (nrf_balloc_idx2block(p_pool, *p_idx) == p_block) + { + NRF_LOG_INST_ERROR(p_pool->p_log, "Attempted to double-free an element (0x%08X).", + p_element); + APP_ERROR_CHECK_BOOL(false); + } + } + } +#endif // NRF_BALLOC_CONFIG_DEBUG_ENABLED + + // Free the element. + *(p_pool->p_cb->p_stack_pointer)++ = nrf_balloc_block2idx(p_pool, p_block); + + CRITICAL_REGION_EXIT(); +} + +#endif // NRF_MODULE_ENABLED(NRF_BALLOC) |