gtk奇怪的行为GtkTree追加

Question

tree_add由另一个线程中的g_idle_add调用 奇怪的行为是散列是垃圾，消息摘要怎么会乱码？

其余的奇怪行为已通过以下建议修复

#include <pthread.h>
#include <openssl/evp.h>
#include <gcrypt.h>
#include <gtk/gtk.h>

unsigned char *mdSHA256(char *data, size_t *len) {
    unsigned char *md = calloc(33, sizeof(char));
    int mdlen;
    EVP_MD_CTX *mdctx;
    EVP_add_digest(EVP_sha256());
    mdctx = EVP_MD_CTX_create();
    EVP_DigestInit_ex(mdctx, EVP_sha256(), NULL);
    EVP_DigestUpdate(mdctx, data, *len);
    EVP_DigestFinal_ex(mdctx, md, &mdlen);
    EVP_MD_CTX_destroy(mdctx);
    EVP_cleanup();
    *len = mdlen;
    return md;
}

struct peer {
    int approved;
    int port;
    unsigned char *address;
    gcry_sexp_t pubkey;
    struct sf_connection *connection;
    struct peer *next;
    struct peer *prev;
};

struct peer *peers = NULL;

struct peer *peer_new() {
    struct peer *_peer = malloc(sizeof(struct peer));
    if(peers == NULL) {
        _peer->next = _peer;
        _peer->prev = _peer;
        peers = _peer;
    }
    else {
        peers->prev->next = _peer;
        _peer->prev = peers->prev;
        peers->prev = _peer;
        _peer->next = peers;
    }
    return _peer;
}

void *mainthread(void *m) { //code removed so you can run this
    sleep(2);
    struct peer *new_peer = new_peer();
    new_peer->port = 66666;
    new_peer->address = "127.0.0.1";
    new_peer->pubkey = NULL;
    new_peer->approved = 0;
    g_idle_add(tree_add, new_peer);
}

gboolean tree_add(gpointer data) {
    struct peer *new_peer = data;
    GtkTreeIter iter;
    size_t size = gcry_sexp_sprint(new_peer->pubkey, GCRY   SEXP_FMT_ADVANCED, NULL, 0);
    char *buf = malloc(size);
    gcry_sexp_sprint(new_peer->pubkey, GCRYSEXP_FMT_ADVANCED, buf, size);
    unsigned char *md = mdSHA256(buf, &size);
    gtk_tree_store_append(serverstore, &iter, NULL);
    gtk_tree_store_set(serverstore, &iter,
                   COL_IP, new_peer->address,
                   COL_PORT, new_peer->port,
                   COL_PUBKEYMD, md,
                   COL_APPROVED, new_peer->approved,
                   -1);
    free(buf);
    free(md);
    return 0;
}

GtkWidget *setup_tree() {
    GtkWidget *tree;
    GtkTreeViewColumn *column;
    GtkCellRenderer *renderer;

    serverstore = gtk_tree_store_new(N_COLUMNS,
                                 G_TYPE_STRING,
                                 G_TYPE_INT,
                                 G_TYPE_STRING,
                                 G_TYPE_BOOLEAN);


    tree = gtk_tree_view_new_with_model(GTK_TREE_MODEL(serverstore));
    g_object_unref(G_OBJECT(serverstore));

    renderer = gtk_cell_renderer_text_new();
    column = gtk_tree_view_column_new_with_attributes("IP", renderer, "text", COL_IP, NULL);
    gtk_tree_view_append_column(GTK_TREE_VIEW(tree), column);

    renderer = gtk_cell_renderer_text_new();
    column = gtk_tree_view_column_new_with_attributes("Port", renderer, "text", COL_PORT, NULL);
    gtk_tree_view_append_column(GTK_TREE_VIEW(tree), column);

    renderer = gtk_cell_renderer_text_new();
    column = gtk_tree_view_column_new_with_attributes("PubKey", renderer, "text", COL_PUBKEYMD, NULL);
    gtk_tree_view_append_column(GTK_TREE_VIEW(tree), column);

    renderer = gtk_cell_renderer_toggle_new();
    column = gtk_tree_view_column_new_with_attributes("Approved", renderer, "active", COL_APPROVED, NULL);
    gtk_tree_view_append_column(GTK_TREE_VIEW(tree), column);

    return tree;
}

void on_window_main_destroy() {
    raise(SIGINT);
    gtk_main_quit();
}

int main(int argc, char **argv) {
    GtkWidget *window;
    GtkWidget *view;

    pthread_t main_thread;
    if(pthread_create(&main_thread, NULL, mainthread, NULL)) {
        fprintf(stderr, "Error creating thread\n");
        return 1;
    }

    gtk_init(&argc, &argv);
    window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
    g_signal_connect(window, "destroy", on_window_main_destroy, NULL);
    gtk_window_set_title(GTK_WINDOW(window), "ProjXverse Master");
    gtk_window_set_default_size(GTK_WINDOW(window), 640, 480);
    view = setup_tree();
    gtk_container_add(GTK_CONTAINER(window), view);
    gtk_widget_show_all(window);
    gtk_main();

    pthread_join(main_thread, NULL);

    return 0;
}

制作

gcc -c main.c -o test `pkg-config --cflags --libs gtk+-3.0` -lcrypto -lgcrypt -lpthread