esp-idf/components/esp32/test/test_backtrace.c

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/*
* Note: Currently, the backtraces must still be checked manually. Therefore,
* these test cases should always pass.
* Todo: Automate the checking of backtrace addresses.
*/
#include <stdlib.h>
#include "unity.h"
#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#include "freertos/xtensa_api.h"
#include "esp_intr_alloc.h"
#define SW_ISR_LEVEL_1 7
#define SW_ISR_LEVEL_3 29
#define RECUR_DEPTH 3
#define ACTION_ABORT -1
#define ACTION_INT_WDT -2
// Set to (-1) for abort(), (-2) for interrupt watchdog
static int backtrace_trigger_source;
/*
* Recursive functions to generate a longer call stack. When the max specified
* recursion depth is reached, the following actions can be taken.
*/
static void __attribute__((__noinline__)) recursive_func(int recur_depth, int action)
{
if (recur_depth > 1) {
recursive_func(recur_depth - 1, action);
} else if (action >= 0) {
xt_set_intset(1 << action);
} else if (action == ACTION_ABORT) {
abort();
// Todo: abort() causes problems in GDB Stub backtrace due to being 'non returning'.
} else if (action == ACTION_INT_WDT) {
portDISABLE_INTERRUPTS();
while (1) {
;
}
}
}
static void level_three_isr (void *arg)
{
xt_set_intclear(1 << SW_ISR_LEVEL_3); //Clear interrupt
recursive_func(RECUR_DEPTH, backtrace_trigger_source); //Abort at the max recursive depth
}
static void level_one_isr(void *arg)
{
xt_set_intclear(1 << SW_ISR_LEVEL_1); //Clear interrupt
recursive_func(RECUR_DEPTH, SW_ISR_LEVEL_3); //Trigger nested interrupt max recursive depth
}
TEST_CASE("Test backtrace from abort", "[reset_reason][reset=abort,SW_CPU_RESET]")
{
//Allocate level one and three SW interrupts
esp_intr_alloc(ETS_INTERNAL_SW0_INTR_SOURCE, 0, level_one_isr, NULL, NULL); //Level 1 SW intr
esp_intr_alloc(ETS_INTERNAL_SW1_INTR_SOURCE, 0, level_three_isr, NULL, NULL); //Level 3 SW intr
backtrace_trigger_source = ACTION_ABORT;
recursive_func(RECUR_DEPTH, SW_ISR_LEVEL_1); //Trigger lvl 1 SW interrupt at max recursive depth
}
TEST_CASE("Test backtrace from interrupt watchdog timeout", "[reset_reason][reset=Interrupt wdt timeout on CPU0,SW_CPU_RESET]")
{
//Allocate level one and three SW interrupts
esp_intr_alloc(ETS_INTERNAL_SW0_INTR_SOURCE, 0, level_one_isr, NULL, NULL); //Level 1 SW intr
esp_intr_alloc(ETS_INTERNAL_SW1_INTR_SOURCE, 0, level_three_isr, NULL, NULL); //Level 3 SW intr
backtrace_trigger_source = ACTION_INT_WDT;
recursive_func(RECUR_DEPTH, SW_ISR_LEVEL_1); //Trigger lvl 1 SW interrupt at max recursive depth
}