From 17f86fdedf03626eed545dcd69c6387a825e0b5d Mon Sep 17 00:00:00 2001 From: Antonio Borneo Date: Sun, 7 May 2023 15:50:26 +0200 Subject: [PATCH] rtos: uCOS-III: split struct ucos_iii_params The static analyser 'sparse' complains about using sizeof() on a struct that has variable size: src/rtos/uCOS-III.c:267:32: warning: using sizeof on a flexible structure src/rtos/uCOS-III.c:269:41: warning: using sizeof on a flexible structure src/rtos/uCOS-III.c:275:66: warning: using sizeof on a flexible structure The struct ucos_iii_params contains either constants values for different target type and variable fields. The last field is an variable size array, always allocated to UCOS_III_MAX_THREADS items. It's not practical to fix this size because we would get too huge initialization in data segment. Split away from struct ucos_iii_params all the variable fields and put them in struct ucos_iii_private. Add in the new struct a pointer to the selected element of ucos_iii_params_list[] and fix the size of array threads[] to its maximum value; this would be allocated at run-time, avoiding impacts to data segment. Change-Id: I569011a257783d35a8795adbda06e942b4157f2a Signed-off-by: Antonio Borneo Reviewed-on: https://review.openocd.org/c/openocd/+/7678 Tested-by: jenkins --- src/rtos/uCOS-III.c | 82 +++++++++++++++++++-------------------------- 1 file changed, 35 insertions(+), 47 deletions(-) diff --git a/src/rtos/uCOS-III.c b/src/rtos/uCOS-III.c index 21be8ff3c..4d704a44f 100644 --- a/src/rtos/uCOS-III.c +++ b/src/rtos/uCOS-III.c @@ -29,6 +29,12 @@ struct ucos_iii_params { const char *target_name; const unsigned char pointer_width; + size_t threadid_start; + const struct rtos_register_stacking *stacking_info; +}; + +struct ucos_iii_private { + const struct ucos_iii_params *params; symbol_address_t thread_stack_offset; symbol_address_t thread_name_offset; symbol_address_t thread_state_offset; @@ -36,40 +42,22 @@ struct ucos_iii_params { symbol_address_t thread_prev_offset; symbol_address_t thread_next_offset; bool thread_offsets_updated; - size_t threadid_start; - const struct rtos_register_stacking *stacking_info; size_t num_threads; - symbol_address_t threads[]; + symbol_address_t threads[UCOS_III_MAX_THREADS]; }; static const struct ucos_iii_params ucos_iii_params_list[] = { { - "cortex_m", /* target_name */ - sizeof(uint32_t), /* pointer_width */ - 0, /* thread_stack_offset */ - 0, /* thread_name_offset */ - 0, /* thread_state_offset */ - 0, /* thread_priority_offset */ - 0, /* thread_prev_offset */ - 0, /* thread_next_offset */ - false, /* thread_offsets_updated */ - 1, /* threadid_start */ - &rtos_ucos_iii_cortex_m_stacking, /* stacking_info */ - 0, /* num_threads */ + .target_name = "cortex_m", + .pointer_width = sizeof(uint32_t), + .threadid_start = 1, + .stacking_info = &rtos_ucos_iii_cortex_m_stacking, }, { - "esirisc", /* target_name */ - sizeof(uint32_t), /* pointer_width */ - 0, /* thread_stack_offset */ - 0, /* thread_name_offset */ - 0, /* thread_state_offset */ - 0, /* thread_priority_offset */ - 0, /* thread_prev_offset */ - 0, /* thread_next_offset */ - false, /* thread_offsets_updated */ - 1, /* threadid_start */ - &rtos_ucos_iii_esi_risc_stacking, /* stacking_info */ - 0, /* num_threads */ + .target_name = "esirisc", + .pointer_width = sizeof(uint32_t), + .threadid_start = 1, + .stacking_info = &rtos_ucos_iii_esi_risc_stacking, }, }; @@ -118,7 +106,7 @@ static const char * const ucos_iii_thread_state_list[] = { static int ucos_iii_find_or_create_thread(struct rtos *rtos, symbol_address_t thread_address, threadid_t *threadid) { - struct ucos_iii_params *params = rtos->rtos_specific_params; + struct ucos_iii_private *params = rtos->rtos_specific_params; size_t thread_index; for (thread_index = 0; thread_index < params->num_threads; thread_index++) @@ -133,17 +121,17 @@ static int ucos_iii_find_or_create_thread(struct rtos *rtos, symbol_address_t th params->threads[thread_index] = thread_address; params->num_threads++; found: - *threadid = thread_index + params->threadid_start; + *threadid = thread_index + params->params->threadid_start; return ERROR_OK; } static int ucos_iii_find_thread_address(struct rtos *rtos, threadid_t threadid, symbol_address_t *thread_address) { - struct ucos_iii_params *params = rtos->rtos_specific_params; + struct ucos_iii_private *params = rtos->rtos_specific_params; size_t thread_index; - thread_index = threadid - params->threadid_start; + thread_index = threadid - params->params->threadid_start; if (thread_index >= params->num_threads) { LOG_ERROR("uCOS-III: failed to find thread address"); return ERROR_FAIL; @@ -155,7 +143,7 @@ static int ucos_iii_find_thread_address(struct rtos *rtos, threadid_t threadid, static int ucos_iii_find_last_thread_address(struct rtos *rtos, symbol_address_t *thread_address) { - struct ucos_iii_params *params = rtos->rtos_specific_params; + struct ucos_iii_private *params = rtos->rtos_specific_params; int retval; /* read the thread list head */ @@ -163,7 +151,7 @@ static int ucos_iii_find_last_thread_address(struct rtos *rtos, symbol_address_t retval = target_read_memory(rtos->target, rtos->symbols[UCOS_III_VAL_OS_TASK_DBG_LIST_PTR].address, - params->pointer_width, + params->params->pointer_width, 1, (void *)&thread_list_address); if (retval != ERROR_OK) { @@ -177,7 +165,7 @@ static int ucos_iii_find_last_thread_address(struct rtos *rtos, symbol_address_t retval = target_read_memory(rtos->target, thread_list_address + params->thread_next_offset, - params->pointer_width, + params->params->pointer_width, 1, (void *)&thread_list_address); if (retval != ERROR_OK) { @@ -191,7 +179,7 @@ static int ucos_iii_find_last_thread_address(struct rtos *rtos, symbol_address_t static int ucos_iii_update_thread_offsets(struct rtos *rtos) { - struct ucos_iii_params *params = rtos->rtos_specific_params; + struct ucos_iii_private *params = rtos->rtos_specific_params; if (params->thread_offsets_updated) return ERROR_OK; @@ -231,7 +219,7 @@ static int ucos_iii_update_thread_offsets(struct rtos *rtos) int retval = target_read_memory(rtos->target, rtos->symbols[thread_offset_map->symbol_value].address, - params->pointer_width, + params->params->pointer_width, 1, (void *)thread_offset_map->thread_offset); if (retval != ERROR_OK) { @@ -252,7 +240,7 @@ static bool ucos_iii_detect_rtos(struct target *target) static int ucos_iii_reset_handler(struct target *target, enum target_reset_mode reset_mode, void *priv) { - struct ucos_iii_params *params = target->rtos->rtos_specific_params; + struct ucos_iii_private *params = target->rtos->rtos_specific_params; params->thread_offsets_updated = false; params->num_threads = 0; @@ -262,17 +250,17 @@ static int ucos_iii_reset_handler(struct target *target, enum target_reset_mode static int ucos_iii_create(struct target *target) { - struct ucos_iii_params *params; + struct ucos_iii_private *params; for (size_t i = 0; i < ARRAY_SIZE(ucos_iii_params_list); i++) if (strcmp(ucos_iii_params_list[i].target_name, target->type->name) == 0) { - params = malloc(sizeof(*params) + (UCOS_III_MAX_THREADS * sizeof(*params->threads))); + params = calloc(1, sizeof(*params)); if (!params) { LOG_ERROR("uCOS-III: out of memory"); return ERROR_FAIL; } - memcpy(params, &ucos_iii_params_list[i], sizeof(ucos_iii_params_list[i])); + params->params = &ucos_iii_params_list[i]; target->rtos->rtos_specific_params = (void *)params; target_register_reset_callback(ucos_iii_reset_handler, NULL); @@ -286,7 +274,7 @@ static int ucos_iii_create(struct target *target) static int ucos_iii_update_threads(struct rtos *rtos) { - struct ucos_iii_params *params = rtos->rtos_specific_params; + struct ucos_iii_private *params = rtos->rtos_specific_params; int retval; if (!rtos->symbols) { @@ -340,7 +328,7 @@ static int ucos_iii_update_threads(struct rtos *rtos) retval = target_read_memory(rtos->target, rtos->symbols[UCOS_III_VAL_OS_TCB_CUR_PTR].address, - params->pointer_width, + params->params->pointer_width, 1, (void *)¤t_thread_address); if (retval != ERROR_OK) { @@ -396,7 +384,7 @@ static int ucos_iii_update_threads(struct rtos *rtos) retval = target_read_memory(rtos->target, thread_address + params->thread_name_offset, - params->pointer_width, + params->params->pointer_width, 1, (void *)&thread_name_address); if (retval != ERROR_OK) { @@ -450,7 +438,7 @@ static int ucos_iii_update_threads(struct rtos *rtos) /* read previous thread address */ retval = target_read_memory(rtos->target, thread_address + params->thread_prev_offset, - params->pointer_width, + params->params->pointer_width, 1, (void *)&thread_address); if (retval != ERROR_OK) { @@ -465,7 +453,7 @@ static int ucos_iii_update_threads(struct rtos *rtos) static int ucos_iii_get_thread_reg_list(struct rtos *rtos, threadid_t threadid, struct rtos_reg **reg_list, int *num_regs) { - struct ucos_iii_params *params = rtos->rtos_specific_params; + struct ucos_iii_private *params = rtos->rtos_specific_params; int retval; /* find thread address for threadid */ @@ -482,7 +470,7 @@ static int ucos_iii_get_thread_reg_list(struct rtos *rtos, threadid_t threadid, retval = target_read_memory(rtos->target, thread_address + params->thread_stack_offset, - params->pointer_width, + params->params->pointer_width, 1, (void *)&stack_address); if (retval != ERROR_OK) { @@ -491,7 +479,7 @@ static int ucos_iii_get_thread_reg_list(struct rtos *rtos, threadid_t threadid, } return rtos_generic_stack_read(rtos->target, - params->stacking_info, + params->params->stacking_info, stack_address, reg_list, num_regs);