#include "substitute-internal.h"
#include "execmem.h"
#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <pthread.h>
#include <assert.h>
/* printf without taking any locks - because they might be taken at stop time */
#define ulprintf(...) do { \
    char buf[256]; \
    int len = sprintf(buf, __VA_ARGS__); \
    write(1, buf, len); \
} while(0)

static void *some_thread(void *ip) {
    long i = (long) ip;
    while (1) {
        ulprintf("Hello from %ld\n", i);
        sleep(1);
    }
}
static void replacement() {
    ulprintf("Bye\n");
    pthread_exit(NULL);
}
static uintptr_t patch_callback(void *ctx, UNUSED uintptr_t pc) {
    assert(!ctx);
    return (uintptr_t) replacement;
}

int main() {
    pthread_t pts[10];
    for (long i = 0; i < 10; i++)
        pthread_create(&pts[i], NULL, some_thread, (void *) i);
    sleep(1);
    char *foo = malloc(0x10000);
    static char bar[16];
    struct execmem_foreign_write writes[] = {
        {foo, bar, 5},
        {foo + 7, bar + 7, 3},
    };
    int ret = execmem_foreign_write_with_pc_patch(writes,
                                                  sizeof(writes)/sizeof(*writes),
                                                  patch_callback,
                                                  NULL);
    ulprintf("==> %d\n", ret);
    void *out;
    for (long i = 0; i < 10; i++)
        assert(!pthread_join(pts[i], &out));
}