Hello Daniel, Thanks for your help!
I’m using OpenSSL backend (as Debian’s default). My program actually blocks in the socket read. I tried to add some traces, but failed : I’ve tried CURL_TRC_CF() and info() tracing functions, but I didn’t get traces, probably because there is no more easy handle ever available, as my problem comes in curl_multi_cleanup(), after all easy_handles have been cleanup… But I send it a 6 signal to get a core, and here is the backtrace when my program is stuck : (gdb) bt #0 __libc_recv (flags=<optimized out>, len=5, buf=0x5639c2314eb3, fd=6) at ../sysdeps/unix/sysv/linux/recv.c:28 #1 __libc_recv (fd=6, buf=0x5639c2314eb3, len=5, flags=0) at ../sysdeps/unix/sysv/linux/recv.c:23 #2 0x00005639c2210e12 in nw_in_read () #3 0x00005639c2210f53 in cf_socket_recv () #4 0x00005639c2209f21 in ossl_bio_cf_in_read () #5 0x00007f70f8b09967 in bread_conv (bio=<optimized out>, data=<optimized out>, datal=<optimized out>, readbytes=0x7ffd3a57be00) at ../crypto/bio/bio_meth.c:123 #6 0x00007f70f8b07f86 in bio_read_intern (b=0x5639c2311fc0, data=0x5639c2314eb3, data@entry=0xd5aabae1ce39, dlen=5, dlen@entry=18446744072672583616, readbytes=readbytes@entry=0x7ffd3a57be00) at ../crypto/bio/bio_lib.c:292 #7 0x00007f70f8b086f3 in BIO_read (dlen=-1036968000, data=0xd5aabae1ce39, b=<optimized out>) at ../crypto/bio/bio_lib.c:318 #8 BIO_read (b=<optimized out>, data=data@entry=0x5639c2314eb3, dlen=dlen@entry=5) at ../crypto/bio/bio_lib.c:310 #9 0x00007f70f9207a70 in ssl3_read_n (s=s@entry=0x5639c23130f0, n=n@entry=5, max=5, extend=extend@entry=0, clearold=clearold@entry=1, readbytes=readbytes@entry=0x7ffd3a57bec8) at ../ssl/record/rec_layer_s3.c:293 #10 0x00007f70f920af5d in ssl3_get_record (s=s@entry=0x5639c23130f0) at ../ssl/record/ssl3_record.c:210 #11 0x00007f70f9209b70 in ssl3_read_bytes (s=<optimized out>, type=23, recvd_type=0x0, buf=0x7ffd3a57c060 "\030\016\"\3029V", len=1024, peek=0, readbytes=0x7ffd3a57c030) at ../ssl/record/rec_layer_s3.c:1350 #12 0x00007f70f91deb2e in ssl3_read_internal (s=0x5639c23130f0, buf=0x7ffd3a57c060, len=1024, peek=0, readbytes=0x7ffd3a57c030) at ../ssl/s3_lib.c:4462 #13 0x00007f70f91ea773 in SSL_read (s=<optimized out>, buf=<optimized out>, num=<optimized out>) at ../ssl/ssl_lib.c:1885 #14 0x00005639c2207128 in ossl_close () #15 0x00005639c21c855a in ssl_cf_close () #16 0x00005639c21d438a in cf_setup_close () #17 0x00005639c220fde2 in cf_hc_close () #18 0x00005639c21beb3a in Curl_disconnect () #19 0x00005639c21d3fc6 in Curl_conncache_close_all_connections () #20 0x00005639c21ae540 in curl_multi_cleanup () #21 0x00005639c2196b12 in web_curl_term () at web_curl.c:236 #22 0x00005639c2190ceb in sortie_g_web () at g_web.c:880 #23 0x00007f70f92df335 in sortie (sig=0, change=false) at a_main.c:958 #24 0x00007f70f92dec36 in t_stop (change=false) at a_main.c:721 #25 0x00007f70f92dea0e in t_message (m=0x5639c22bd600 "se", lng=3, pcl=0x7ffd3a57cdc0) at a_main.c:665 #26 0x00007f70f92de6f8 in traite_ev () at a_main.c:552 #27 0x00007f70f92dd781 in main (c=1, v=0x7ffd3a57cf58) at a_main.c:134 Regards, Fred. -- Unsubscribe: https://lists.haxx.se/mailman/listinfo/curl-library Etiquette: https://curl.se/mail/etiquette.html