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gcov: Fixes aborted calls to _lock_acquire_recursive from gcov stub

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This commit is contained in:
Alexey Gerenkov 2019-12-02 14:01:45 +03:00 committed by bot
parent f7b51c164d
commit 184e1785ff
1 changed files with 64 additions and 0 deletions
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64
components/app_trace/gcov/gcov_rtio.c
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@ -14,14 +14,21 @@
// 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/cpu.h"
#include "soc/timer_periph.h"
#include "esp_app_trace.h"
#include "esp_private/dbg_stubs.h"
#include "hal/timer_ll.h"
#if CONFIG_IDF_TARGET_ESP32
#include "esp32/rom/libc_stubs.h"
#elif CONFIG_IDF_TARGET_ESP32S2BETA
#include "esp32s2beta/rom/libc_stubs.h"
#endif
#if CONFIG_APPTRACE_GCOV_ENABLE
@ -34,9 +41,34 @@ const static char *TAG = "esp_gcov_rtio";
extern void __gcov_dump(void);
extern void __gcov_reset(void);
static struct syscall_stub_table s_gcov_stub_table;
static int gcov_stub_lock_try_acquire_recursive(_lock_t *lock)
{
if (*lock && uxSemaphoreGetCount((xSemaphoreHandle)(*lock)) == 0) {
// we can do nothing here, gcov dump is initiated with some resource locked
// which is also used by gcov functions
ESP_EARLY_LOGE(TAG, "Lock 0x%x is busy during GCOV dump! System state can be inconsistent after dump!", lock);
}
return pdTRUE;
}
static void gcov_stub_lock_acquire_recursive(_lock_t *lock)
{
gcov_stub_lock_try_acquire_recursive(lock);
}
static void gcov_stub_lock_release_recursive(_lock_t *lock)
{
}
static int esp_dbg_stub_gcov_dump_do(void)
{
int ret = ESP_OK;
FILE* old_stderr = stderr;
FILE* old_stdout = stdout;
struct syscall_stub_table* old_table = syscall_table_ptr_pro;
ESP_EARLY_LOGV(TAG, "Alloc apptrace down buf %d bytes", ESP_GCOV_DOWN_BUF_SIZE);
void *down_buf = malloc(ESP_GCOV_DOWN_BUF_SIZE);
@ -47,9 +79,22 @@ static int esp_dbg_stub_gcov_dump_do(void)
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...");
// incase of dual-core chip APP and PRO CPUs share the same table, so it is safe to save only PRO's table
memcpy(&s_gcov_stub_table, old_table, sizeof(s_gcov_stub_table));
s_gcov_stub_table._lock_acquire_recursive = &gcov_stub_lock_acquire_recursive;
s_gcov_stub_table._lock_release_recursive = &gcov_stub_lock_release_recursive;
s_gcov_stub_table._lock_try_acquire_recursive = &gcov_stub_lock_try_acquire_recursive,
syscall_table_ptr_pro = &s_gcov_stub_table;
stderr = (FILE*) &__sf_fake_stderr;
stdout = (FILE*) &__sf_fake_stdout;
__gcov_dump();
// reset dump status to allow incremental data accumulation
__gcov_reset();
stdout = old_stdout;
stderr = old_stderr;
syscall_table_ptr_pro = old_table;
ESP_EARLY_LOGV(TAG, "Free apptrace down buf");
free(down_buf);
ESP_EARLY_LOGV(TAG, "Finish file transfer session");
@ -60,6 +105,25 @@ static int esp_dbg_stub_gcov_dump_do(void)
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)
{
return esp_dbg_stub_gcov_dump_do();
}
int gcov_rtio_atexit(void (*function)(void) __attribute__ ((unused)))
{
ESP_EARLY_LOGV(TAG, "%s", __FUNCTION__);
esp_dbg_stub_entry_set(ESP_DBG_STUB_ENTRY_GCOV, (uint32_t)&esp_dbg_stub_gcov_entry);
return 0;
}
void esp_gcov_dump(void)
{
// disable IRQs on this CPU, other CPU is halted by OpenOCD