[gmime-devel] using gmime in a multithreaded application

[Dan Streit <danws6 gmail com>]

Hello,

I'm trying to use gmime in a multi threaded application but I am experience some segfaults when starting a lot of worker threads.

In my main thread I init the library:

    g_mime_init (0);

in my worker threads I have:

GMimeMessage *message;
GMimeParser *parser;
GMimeStream *stream;
GMimeStream *stream_in;

Header hdr;
Body bdy;
    
stream = g_mime_stream_cat_new ();

hdr = priv->hhead;
while ( hdr != NULL )
{
    stream_in = g_mime_stream_mem_new_with_buffer ( hdr->hdr_h, strlen( hdr->hdr_h ) );
    g_mime_stream_cat_add_source ((GMimeStreamCat *) stream, stream_in);
    g_object_unref(stream_in);

    stream_in = g_mime_stream_mem_new_with_buffer ( ": ", 2 );
    g_mime_stream_cat_add_source ((GMimeStreamCat *) stream, stream_in);
    g_object_unref(stream_in);

    stream_in = g_mime_stream_mem_new_with_buffer ( hdr->hdr_v, strlen( hdr->hdr_v ) );
    g_mime_stream_cat_add_source ((GMimeStreamCat *) stream, stream_in);
    g_object_unref(stream_in);

    stream_in = g_mime_stream_mem_new_with_buffer ( "\r\n", 2 );
    g_mime_stream_cat_add_source ((GMimeStreamCat *) stream, stream_in);
    g_object_unref(stream_in);

    hdr = hdr->hdr_next;
}

bdy = priv->bhead;
while ( bdy != NULL )
{
    stream_in = g_mime_stream_mem_new_with_buffer (bdy->body_b, strlen(bdy->body_b));
    g_mime_stream_cat_add_source ((GMimeStreamCat *) stream, stream_in);
    g_object_unref(stream_in);
    
    bdy = bdy->body_next;
}

if ( g_mime_stream_length( stream ) > 0 )
{
    parser = g_mime_parser_new_with_stream (stream);

    g_object_unref (stream);

    message = g_mime_parser_construct_message (parser);

    g_object_unref (parser);

    g_mime_message_foreach (message, process_callback, user_data);

    g_object_unref (message);
}

A few examples of some of the segfaults I've seen are:

t 86 (l 86) terminated by signal SEGV (no mapping at the fault address)
0xfef3209c: _g_slist_alloc+0x009e:      movl     0x00000004(%ebx),%ecx

and

  [1] magazine_chain_pop_head(0x80ddd98), at 0xfe6adf40
  [2] thread_memory_magazine1_alloc(0x80ddd80, 0x2, 0xfe161298, 0xfe6ae5ff), at 0xfe6ae71a
  [3] g_slice_alloc(0x14, 0x80e05f8, 0x80df6b8, 0xfef282cf, 0x8083f80, 0xfef2886a), at 0xfe6ae666
=>[4] event_list_add(list = (nil), callback = 0xfe1612c8, user_data = (nil)), line 109 in "internet-address.c"
  [5] _internet_address_list_add(list = 0xfe1612f8, ia = (nil)), line 801 in "internet-address.c"
  [6] internet_address_list_parse_string(str = 0x8084880 "xxxx xxxxxx net"), line 1615 in "internet-address.c"
  [7] message_add_recipients_from_string(message = (nil), action = "" type = GMIME_RECIPIENT_TYPE_TO, str = 0x8084880 "xxxx xxxxxx net"), line 694 in "gmime-message.c"
  [8] process_header(object = 0x80dd0e8, action = "" header = (nil), value = 0x8084880 "xxxx xxxxxx net"), line 739 in "gmime-message.c"
  [9] message_append_header(object = 0x80dd0e8, header = 0xfe1613b8 "\xe8^S^V\xfe\xf1!\xad\xfe\xe8\xd0^M^H\xb8\xfe^H^H\x80H^H^H^B", value = (nil)), line 809 in "gmime-message.c"
  [10] g_mime_object_append_header(object = 0xfe1613e8, header = 0x808feb8 "To", value = (nil)), line 824 in "gmime-object.c"
  [11] parser_construct_leaf_part(parser = 0x80e0298, content_type = 0xfe161438, found = 0xfe161468), line 1521 in "gmime-parser.c"
  [12] parser_construct_multipart(parser = 0x80e0298, content_type = (nil), found = 0xfe1614b0), line 1695 in "gmime-parser.c"
  [13] g_mime_parser_construct_message(parser = 0x80e0298), line 1863 in "gmime-parser.c"

Am I doing something wrong or is this possibly an environment issue?

Solaris 10 
gcc 3.4.6
glib 2.20.4
gmime 2.4.15

Thanks,
Dan