esp-idf/components/app_trace/gcov/gcov_rtio.c

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/*
* SPDX-FileCopyrightText: 2017-2021 Espressif Systems (Shanghai) CO LTD
*
* SPDX-License-Identifier: Apache-2.0
*/
// This module implements runtime file I/O API for GCOV.
#include <string.h>
#include "esp_task_wdt.h"
#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#include "freertos/semphr.h"
#include "soc/timer_periph.h"
#include "esp_app_trace.h"
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#include "esp_freertos_hooks.h"
#include "esp_private/dbg_stubs.h"
#include "esp_ipc.h"
#include "hal/wdt_hal.h"
#if CONFIG_IDF_TARGET_ESP32
#include "esp32/rom/libc_stubs.h"
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#elif CONFIG_IDF_TARGET_ESP32S2
#include "esp32s2/rom/libc_stubs.h"
#endif
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#if CONFIG_APPTRACE_GCOV_ENABLE
#define ESP_GCOV_DOWN_BUF_SIZE 4200
#include "esp_log.h"
const static char *TAG = "esp_gcov_rtio";
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static volatile bool s_create_gcov_task = false;
static volatile bool s_gcov_task_running = false;
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extern void __gcov_dump(void);
extern void __gcov_reset(void);
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void gcov_dump_task(void *pvParameter)
{
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int dump_result = 0;
bool *running = (bool *)pvParameter;
ESP_EARLY_LOGV(TAG, "%s stack use in %d", __FUNCTION__, uxTaskGetStackHighWaterMark(NULL));
ESP_EARLY_LOGV(TAG, "Alloc apptrace down buf %d bytes", ESP_GCOV_DOWN_BUF_SIZE);
void *down_buf = malloc(ESP_GCOV_DOWN_BUF_SIZE);
if (down_buf == NULL) {
ESP_EARLY_LOGE(TAG, "Could not allocate memory for the buffer");
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dump_result = ESP_ERR_NO_MEM;
goto gcov_exit;
}
ESP_EARLY_LOGV(TAG, "Config apptrace down buf");
esp_apptrace_down_buffer_config(down_buf, ESP_GCOV_DOWN_BUF_SIZE);
ESP_EARLY_LOGV(TAG, "Dump data...");
__gcov_dump();
// reset dump status to allow incremental data accumulation
__gcov_reset();
free(down_buf);
ESP_EARLY_LOGV(TAG, "Finish file transfer session");
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dump_result = esp_apptrace_fstop(ESP_APPTRACE_DEST_TRAX);
if (dump_result != ESP_OK) {
ESP_EARLY_LOGE(TAG, "Failed to send files transfer stop cmd (%d)!", dump_result);
}
gcov_exit:
ESP_EARLY_LOGV(TAG, "dump_result %d", dump_result);
if (running) {
*running = false;
}
ESP_EARLY_LOGV(TAG, "%s stack use out %d", __FUNCTION__, uxTaskGetStackHighWaterMark(NULL));
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vTaskDelete(NULL);
}
void gcov_create_task(void *arg)
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{
ESP_EARLY_LOGV(TAG, "%s", __FUNCTION__);
xTaskCreatePinnedToCore(&gcov_dump_task, "gcov_dump_task", CONFIG_APPTRACE_GCOV_DUMP_TASK_STACK_SIZE,
(void *)&s_gcov_task_running, configMAX_PRIORITIES - 1, NULL, 0);
}
void gcov_create_task_tick_hook(void)
{
extern esp_err_t esp_ipc_start_gcov_from_isr(uint32_t cpu_id, esp_ipc_func_t func, void* arg);
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if (s_create_gcov_task) {
if (esp_ipc_start_gcov_from_isr(xPortGetCoreID(), &gcov_create_task, NULL) == ESP_OK) {
s_create_gcov_task = false;
}
}
}
/**
* @brief Triggers gcov info dump task
* This function is to be called by OpenOCD, not by normal user code.
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* TODO: what about interrupted flash access (when cache disabled)
*
* @return ESP_OK on success, otherwise see esp_err_t
*/
static int esp_dbg_stub_gcov_entry(void)
{
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/* we are in isr context here */
s_create_gcov_task = true;
return ESP_OK;
}
void gcov_rtio_init(void)
{
uint32_t capabilities = 0;
ESP_EARLY_LOGV(TAG, "%s", __FUNCTION__);
esp_dbg_stub_entry_set(ESP_DBG_STUB_ENTRY_GCOV, (uint32_t)&esp_dbg_stub_gcov_entry);
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if (esp_dbg_stub_entry_get(ESP_DBG_STUB_ENTRY_CAPABILITIES, &capabilities) == ESP_OK) {
esp_dbg_stub_entry_set(ESP_DBG_STUB_ENTRY_CAPABILITIES, capabilities | ESP_DBG_STUB_CAP_GCOV_TASK);
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}
esp_register_freertos_tick_hook(gcov_create_task_tick_hook);
}
void esp_gcov_dump(void)
{
ESP_EARLY_LOGV(TAG, "%s", __FUNCTION__);
while (!esp_apptrace_host_is_connected(ESP_APPTRACE_DEST_TRAX)) {
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vTaskDelay(pdMS_TO_TICKS(10));
}
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/* We are not in isr context here. Waiting for the completion is safe */
s_gcov_task_running = true;
s_create_gcov_task = true;
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while (s_gcov_task_running) {
vTaskDelay(pdMS_TO_TICKS(10));
}
}
void *gcov_rtio_fopen(const char *path, const char *mode)
{
ESP_EARLY_LOGV(TAG, "%s '%s' '%s'", __FUNCTION__, path, mode);
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void *f = esp_apptrace_fopen(ESP_APPTRACE_DEST_TRAX, path, mode);
ESP_EARLY_LOGV(TAG, "%s ret %p", __FUNCTION__, f);
return f;
}
int gcov_rtio_fclose(void *stream)
{
ESP_EARLY_LOGV(TAG, "%s", __FUNCTION__);
return esp_apptrace_fclose(ESP_APPTRACE_DEST_TRAX, stream);
}
size_t gcov_rtio_fread(void *ptr, size_t size, size_t nmemb, void *stream)
{
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ESP_EARLY_LOGV(TAG, "%s read %u", __FUNCTION__, size * nmemb);
size_t sz = esp_apptrace_fread(ESP_APPTRACE_DEST_TRAX, ptr, size, nmemb, stream);
ESP_EARLY_LOGV(TAG, "%s actually read %u", __FUNCTION__, sz);
return sz;
}
size_t gcov_rtio_fwrite(const void *ptr, size_t size, size_t nmemb, void *stream)
{
ESP_EARLY_LOGV(TAG, "%s", __FUNCTION__);
return esp_apptrace_fwrite(ESP_APPTRACE_DEST_TRAX, ptr, size, nmemb, stream);
}
int gcov_rtio_fseek(void *stream, long offset, int whence)
{
int ret = esp_apptrace_fseek(ESP_APPTRACE_DEST_TRAX, stream, offset, whence);
ESP_EARLY_LOGV(TAG, "%s(%p %ld %d) = %d", __FUNCTION__, stream, offset, whence, ret);
return ret;
}
long gcov_rtio_ftell(void *stream)
{
long ret = esp_apptrace_ftell(ESP_APPTRACE_DEST_TRAX, stream);
ESP_EARLY_LOGV(TAG, "%s(%p) = %ld", __FUNCTION__, stream, ret);
return ret;
}
void gcov_rtio_setbuf(void *arg1 __attribute__ ((unused)), void *arg2 __attribute__ ((unused)))
{
return;
}
/* Wrappers for Gcov functions */
extern void __real___gcov_init(void *info);
void __wrap___gcov_init(void *info)
{
__real___gcov_init(info);
gcov_rtio_init();
}
#endif