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gcov: use GCC API to control GCOV data dumps

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This commit is contained in:
Alexey Gerenkov 2018-06-28 16:38:17 +03:00 committed by Anton Maklakov
parent 9a55557ad8
commit f0c15e749a
2 changed files with 52 additions and 32 deletions
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79
components/app_trace/gcov/gcov_rtio.c
View file

@ -31,10 +31,13 @@
#include "esp_log.h"
const static char *TAG = "esp_gcov_rtio";
static void (*s_gcov_exit)(void);
#if GCC_NOT_5_2_0
void __gcov_dump(void);
void __gcov_reset(void);
#else
/* The next code for old GCC */
/* TODO: remove code extracted from GCC when IDF toolchain will be updated */
/*=============== GCC CODE START ====================*/
static void (*s_gcov_exit)(void);
/* Root of a program/shared-object state */
struct gcov_root
{
@ -53,27 +56,36 @@ static void esp_gcov_reset_status(void)
__gcov_root.dumped = 0;
__gcov_root.run_counted = 0;
}
/*=============== GCC CODE END ====================*/
#endif
static int esp_dbg_stub_gcov_dump_do(void)
{
int ret = ESP_OK;
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");
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...");
#if GCC_NOT_5_2_0
__gcov_dump();
// reset dump status to allow incremental data accumulation
__gcov_reset();
#else
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);
// reset dump status to allow incremental data accumulation
esp_gcov_reset_status();
}
#endif
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) {
@ -91,24 +103,26 @@ static int esp_dbg_stub_gcov_dump_do(void)
*/
static int esp_dbg_stub_gcov_entry(void)
{
#if GCC_NOT_5_2_0
return esp_dbg_stub_gcov_dump_do();
#else
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;
#endif
}
void esp_gcov_dump()
{
#if CONFIG_FREERTOS_UNICORE == 0
// disable IRQs on this CPU, other CPU is halted by OpenOCD
unsigned irq_state = portENTER_CRITICAL_NESTED();
#if !CONFIG_FREERTOS_UNICORE
int other_core = xPortGetCoreID() ? 0 : 1;
esp_cpu_stall(other_core);
#endif
while (!esp_apptrace_host_is_connected(ESP_APPTRACE_DEST_TRAX)) {
// to avoid complains that task watchdog got triggered for other tasks
TIMERG0.wdt_wprotect=TIMG_WDT_WKEY_VALUE;
@ -121,24 +135,27 @@ void esp_gcov_dump()
}
esp_dbg_stub_gcov_dump_do();
// reset dump status to allow incremental data accumulation
esp_gcov_reset_status();
#if CONFIG_FREERTOS_UNICORE == 0
#if !CONFIG_FREERTOS_UNICORE
esp_cpu_unstall(other_core);
#endif
portEXIT_CRITICAL_NESTED(irq_state);
}
int gcov_rtio_atexit(void (*function)(void))
int gcov_rtio_atexit(void (*function)(void) __attribute__ ((unused)))
{
#if GCC_NOT_5_2_0
ESP_EARLY_LOGV(TAG, "%s", __FUNCTION__);
#else
ESP_EARLY_LOGV(TAG, "%s %p", __FUNCTION__, function);
s_gcov_exit = function;
#endif
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__);
ESP_EARLY_LOGV(TAG, "%s '%s' '%s'", __FUNCTION__, path, mode);
return esp_apptrace_fopen(ESP_APPTRACE_DEST_TRAX, path, mode);
}
@ -150,8 +167,10 @@ int gcov_rtio_fclose(void *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);
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)
@ -162,17 +181,15 @@ size_t gcov_rtio_fwrite(const void *ptr, size_t size, size_t nmemb, void *stream
int gcov_rtio_fseek(void *stream, long offset, int 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__);
ESP_EARLY_LOGV(TAG, "%s(%p %ld %d) = %d", __FUNCTION__, stream, offset, whence, ret);
return ret;
}
long gcov_rtio_ftell(void *stream)
{
ESP_EARLY_LOGV(TAG, "%s", __FUNCTION__);
long ret = esp_apptrace_ftell(ESP_APPTRACE_DEST_TRAX, stream);
ESP_EARLY_LOGV(TAG, "%s", __FUNCTION__);
ESP_EARLY_LOGV(TAG, "%s(%p) = %ld", __FUNCTION__, stream, ret);
return ret;
}
#endif

5
examples/system/gcov/README.md
View file

@ -157,4 +157,7 @@ Writing directory view page.
Overall coverage rate:
lines......: 90.0% (18 of 20 lines)
functions..: 100.0% (3 of 3 functions)
```
```
NOTE: Since `lcov` tool is not part of GCC bundle it can happen that format of GCOV binary data has been changed and your local version of `lcov` fails to understand it.
So it always better to use the latest `lcov` version from [LCOV repo](https://github.com/linux-test-project/lcov).