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esp32: Adds GCOV debug stubs support

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Adds the following functionality
 - Debug stubs infrastructure
 - Stub for retrieveing GCOV data without user source code modification
This commit is contained in:
Alexey Gerenkov
2018-02-15 20:09:03 +03:00
parent f885e8b8de
commit c1b6a37bb1
10 changed files with 437 additions and 73 deletions
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115
components/app_trace/gcov/gcov_rtio.c
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@@ -21,20 +21,92 @@
#include "soc/timer_group_struct.h"
#include "soc/timer_group_reg.h"
#include "esp_app_trace.h"
#include "esp_dbg_stubs.h"
#if CONFIG_ESP32_APPTRACE_ENABLE
#if CONFIG_ESP32_GCOV_ENABLE
#define ESP_GCOV_DOWN_BUF_SIZE 4200
#define LOG_LOCAL_LEVEL CONFIG_LOG_DEFAULT_LEVEL
#include "esp_log.h"
const static char *TAG = "esp_gcov_rtio";
static void (*s_gcov_exit)(void);
static uint8_t s_gcov_down_buf[256];
/* TODO: remove code extracted from GCC when IDF toolchain will be updated */
/*=============== GCC CODE START ====================*/
/* Root of a program/shared-object state */
struct gcov_root
{
void *list;
unsigned dumped : 1; /* counts have been dumped. */
unsigned run_counted : 1; /* run has been accounted for. */
struct gcov_root *next;
struct gcov_root *prev;
};
/* Per-dynamic-object gcov state. */
extern struct gcov_root __gcov_root;
static void esp_gcov_reset_status(void)
{
__gcov_root.dumped = 0;
__gcov_root.run_counted = 0;
}
/*=============== GCC CODE END ====================*/
static int esp_dbg_stub_gcov_dump_do(void)
{
int ret = ESP_OK;
ESP_EARLY_LOGV(TAG, "Check for dump handler %p", s_gcov_exit);
if (s_gcov_exit) {
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, "Failed to send files transfer stop cmd (%d)!", ret);
return ESP_ERR_NO_MEM;
}
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... %p", s_gcov_exit);
s_gcov_exit();
ESP_EARLY_LOGV(TAG, "Free apptrace down buf");
free(down_buf);
}
ESP_EARLY_LOGV(TAG, "Finish file transfer session");
ret = esp_apptrace_fstop(ESP_APPTRACE_DEST_TRAX);
if (ret != ESP_OK) {
ESP_EARLY_LOGE(TAG, "Failed to send files transfer stop cmd (%d)!", ret);
}
return ret;
}
/**
* @brief Triggers gcov info dump.
* This function is to be called by OpenOCD, not by normal user code.
* 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)
{
int ret = ESP_OK;
// disable IRQs on this CPU, other CPU is halted by OpenOCD
unsigned irq_state = portENTER_CRITICAL_NESTED();
ret = esp_dbg_stub_gcov_dump_do();
// reset dump status to allow incremental data accumulation
esp_gcov_reset_status();
portEXIT_CRITICAL_NESTED(irq_state);
return ret;
}
void esp_gcov_dump()
{
#if CONFIG_FREERTOS_UNICORE == 0
esp_cpu_stall(!xPortGetCoreID());
int other_core = xPortGetCoreID() ? 0 : 1;
esp_cpu_stall(other_core);
#endif
while (!esp_apptrace_host_is_connected(ESP_APPTRACE_DEST_TRAX)) {
@@ -48,46 +120,59 @@ void esp_gcov_dump()
TIMERG1.wdt_wprotect=0;
}
if (s_gcov_exit) {
esp_apptrace_down_buffer_config(s_gcov_down_buf, sizeof(s_gcov_down_buf));
s_gcov_exit();
}
int ret = esp_apptrace_fstop(ESP_APPTRACE_DEST_TRAX);
if (ret != ESP_OK) {
ESP_LOGE(TAG, "Failed to send files transfer stop cmd (%d)!\n", ret);
}
esp_dbg_stub_gcov_dump_do();
// reset dump status to allow incremental data accumulation
esp_gcov_reset_status();
#if CONFIG_FREERTOS_UNICORE == 0
esp_cpu_unstall(other_core);
#endif
}
int gcov_rtio_atexit(void (*function)(void))
{
ESP_EARLY_LOGV(TAG, "%s %p", __FUNCTION__, function);
s_gcov_exit = function;
esp_dbg_stub_entry_set(ESP_DBG_STUB_ENTRY_GCOV, (uint32_t)&esp_dbg_stub_gcov_entry);
return 0;
}
void *gcov_rtio_fopen(const char *path, const char *mode)
{
ESP_EARLY_LOGV(TAG, "%s", __FUNCTION__);
return esp_apptrace_fopen(ESP_APPTRACE_DEST_TRAX, path, mode);
}
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)
{
ESP_EARLY_LOGV(TAG, "%s", __FUNCTION__);
return esp_apptrace_fread(ESP_APPTRACE_DEST_TRAX, ptr, size, nmemb, stream);
}
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)
{
return esp_apptrace_fseek(ESP_APPTRACE_DEST_TRAX, stream, offset, whence);
ESP_EARLY_LOGV(TAG, "%s", __FUNCTION__);
int ret = esp_apptrace_fseek(ESP_APPTRACE_DEST_TRAX, stream, offset, whence);
ESP_EARLY_LOGV(TAG, "%s EXIT", __FUNCTION__);
return ret;
}
long gcov_rtio_ftell(void *stream)
{
return esp_apptrace_ftell(ESP_APPTRACE_DEST_TRAX, stream);
ESP_EARLY_LOGV(TAG, "%s", __FUNCTION__);
long ret = esp_apptrace_ftell(ESP_APPTRACE_DEST_TRAX, stream);
ESP_EARLY_LOGV(TAG, "%s", __FUNCTION__);
return ret;
}
#endif