// 02_stack_overflow_nonexample.c (Wokwi-ready)
// Demonstrates overflowing a small stack buffer by passing a larger size to snprintf.

#include <stdio.h>
#include "freertos/FreeRTOS.h"
#include "freertos/task.h"

static void tiny_stack_task(void *arg) {
    char buf[2];
    int x;
    printf("[OF] about to write up to 64 bytes into an 2-byte buffer...\n");
    // Overflow: snprintf instructed to write up to 64 bytes into 8.
    // Some systems may still appear to "work", others may crash.
    snprintf(buf, 64, "temp=%d", 1234567890);
    printf("[OF] buf now claims: \"%s\" (undefined behavior)\n", buf);
    vTaskDelete(NULL);
}

void app_main(void) {
    setvbuf(stdout, NULL, _IONBF, 0);
    printf("[OF] starting non-example\n");
    xTaskCreate(tiny_stack_task, "tiny", 2048, NULL, 5, NULL);
    for (;;) vTaskDelay(pdMS_TO_TICKS(1000));
}