[graalvm-users] Trying to run pgbouncer on GraalVM/Sulong
Alvaro Hernandez
aht at ongres.com
Mon Jul 2 07:31:16 PDT 2018
On 02/07/18 17:28, Roland Schatz wrote:
> Hi Álvaro,
>
> Thanks for the bug report. This is indeed a problem in Sulong. The
> problem is that the `SYS_getrandom` syscall is not implemented in Sulong.
> Supporting this syscall should be easy (at least on Linux). I'll look
> into that.
>
>
> I have no idea how a direct syscall invocation ended up in the code,
> normally this goes through the `getrandom` libc function. There may be
> some explicit inlining going on. But regardless of how the syscall got
> there, we should of course support it.
>
>
> - Roland
Awesome! Good to know it is a bug, feedback helped, and that it can
be tackled down. Please let mw know if you had a patch, I'd be happy to
test it :)
Thanks,
Álvaro
--
Alvaro Hernandez
-----------
OnGres
>
> On 06/30/2018 10:19 PM, Alvaro Hernandez wrote:
>> Hi!
>>
>> I'm experimenting with running C programs on GraalVM (via Sulong,
>> of course). I was trying to run pgbouncer (https://urldefense.proofpoint.com/v2/url?u=https-3A__pgbouncer.github.io_&d=DwIDaQ&c=RoP1YumCXCgaWHvlZYR8PZh8Bv7qIrMUB65eapI_JnE&r=CUkXBxBNT_D5N6HMJ5T9Z6rmvNKYsqupcbk72K0lcoQ&m=Gco5cPtfzG1KXkzFZMUjdOvz53gzbxvOhpXBb2y49D8&s=eVSVV9UdDIAoukIzhGBU-o8Xehp5evajYYa9iMvVW88&e=)
>> a PostgreSQL's connection pooler written in C.
>>
>> Following indications from
>> https://urldefense.proofpoint.com/v2/url?u=http-3A__gbalats.github.io_2015_12_10_compiling-2Dautotooled-2Dprojects-2Dto-2DLLVM-2Dbitcode.html&d=DwIDaQ&c=RoP1YumCXCgaWHvlZYR8PZh8Bv7qIrMUB65eapI_JnE&r=CUkXBxBNT_D5N6HMJ5T9Z6rmvNKYsqupcbk72K0lcoQ&m=Gco5cPtfzG1KXkzFZMUjdOvz53gzbxvOhpXBb2y49D8&s=cZZKamlG5JPUfuURIAaIi5I6EYBVX-IGHvZ3ia_4Ni0&e=
>> I have been able to compile it to IR. More precisely, the steps taken
>> have been:
>>
>>
>> export CC=clang
>> export CXX=clang++
>> export RANLIB=llvm-ranlib-6.0
>> export CFLAGS=" -flto -std=gnu99 "
>> export LDFLAGS=" -flto -fuse-ld=gold -Wl,-plugin-opt=save-temps "
>>
>> ./configure --without-openssl
>> make
>>
>> I'm using clang 6.0. Build is fine (I had problems when building
>> with SSL, so I disabled it, that's fine for now). pgbouncer starts OK
>> when I provided the linked libraries (in .so), but throws
>> RuntimeException when trying to establish a connection through the proxy:
>>
>> graalvm-ce-1.0.0-rc2/bin/lli --lib
>> /usr/lib/x86_64-linux-gnu/libevent-2.0.so.5
>> /tmp/pgbouncer-1.8.1/pgbouncer.0.5.precodegen.bc
>> /tmp/pgbouncer-1.8.1/etc/pgbouncer.ini
>> 2018-06-30 23:01:50.132 31696 LOG File descriptor limit: 65536
>> (H:65536), max_client_conn: 100, max fds possible: 190
>> 2018-06-30 23:01:50.145 31696 LOG Stale pidfile, removing
>> 2018-06-30 23:01:50.165 31696 LOG listening on 127.0.0.1:6432
>> 2018-06-30 23:01:50.167 31696 LOG listening on unix:/tmp/.s.PGSQL.6432
>> 2018-06-30 23:01:50.170 31696 LOG process up: pgbouncer 1.8.1, libevent
>> 2.0.21-stable (epoll), adns: evdns2, tls: unsupported
>> 2018-06-30 23:01:51.443 31696 LOG C-0x44e13e0: aht/aht at unix(31703):6432
>> login attempt: db=aht user=aht
>> tls=no <----- connection attempted
>> 2018-06-30 23:01:51.464 31696 LOG S-0x44e68c0: aht/aht at unix:5432 new
>> connection to server
>> java.lang.RuntimeException: unknown syscall 318
>>
>>
>> RC1 provided more info:
>>
>> graalvm-1.0.0-rc1/bin/lli --lib
>> /usr/lib/x86_64-linux-gnu/libevent-2.0.so.5
>> /tmp/pgbouncer-1.8.1/pgbouncer.0.5.precodegen.bc
>> /tmp/pgbouncer-1.8.1/etc/pgbouncer.ini
>> 2018-06-30 23:02:35.600 31804 LOG File descriptor limit: 65536
>> (H:65536), max_client_conn: 100, max fds possible: 190
>> 2018-06-30 23:02:35.617 31804 LOG Stale pidfile, removing
>> 2018-06-30 23:02:35.648 31804 LOG listening on 127.0.0.1:6432
>> 2018-06-30 23:02:35.654 31804 LOG listening on unix:/tmp/.s.PGSQL.6432
>> 2018-06-30 23:02:35.659 31804 LOG process up: pgbouncer 1.8.1, libevent
>> 2.0.21-stable (epoll), adns: evdns2, tls: unsupported
>> 2018-06-30 23:02:36.784 31804 LOG C-0x4ac2bc0: aht/aht at unix(31811):6432
>> login attempt: db=aht user=aht tls=no
>> 2018-06-30 23:02:36.805 31804 LOG S-0x4ac7b90: aht/aht at unix:5432 new
>> connection to server
>> com.oracle.truffle.llvm.runtime.SulongRuntimeException: RuntimeException
>> unknown syscall 318
>>
>> C stack trace:
>> LLVM IR Function @getrandom in pgbouncer.0.5.precodegen.bc in
>> Block {id: 0 name: %2}
>> LLVM IR Function @getentropy_getrandom in
>> pgbouncer.0.5.precodegen.bc in Block {id: 1 name: %7}
>> LLVM IR Function @usual_getentropy in
>> pgbouncer.0.5.precodegen.bc in Block {id: 3 name: %17}
>> LLVM IR Function @impl_init.1436 in
>> pgbouncer.0.5.precodegen.bc in Block {id: 0 name: %0}
>> LLVM IR Function @prng_check_and_lock in
>> pgbouncer.0.5.precodegen.bc in Block {id: 3 name: %12}
>> LLVM IR Function @csrandom_bytes in
>> pgbouncer.0.5.precodegen.bc in Block {id: 0 name: %2}
>> LLVM IR Function @get_random_bytes in
>> pgbouncer.0.5.precodegen.bc in Block {id: 0 name: %2}
>> LLVM IR Function @welcome_client in
>> pgbouncer.0.5.precodegen.bc in Block {id: 4 name: %26}
>> LLVM IR Function @finish_client_login in
>> pgbouncer.0.5.precodegen.bc in Block {id: 13 name: %59}
>> LLVM IR Function @handle_client_startup in
>> pgbouncer.0.5.precodegen.bc in Block {id: 4 name: %37}
>> LLVM IR Function @client_proto in pgbouncer.0.5.precodegen.bc
>> in Block {id: 20 name: %96}
>> LLVM IR Function @sbuf_call_proto in
>> pgbouncer.0.5.precodegen.bc in Block {id: 8 name: %28}
>> LLVM IR Function @sbuf_process_pending in
>> pgbouncer.0.5.precodegen.bc in Block {id: 10 name: %36}
>> LLVM IR Function @sbuf_main_loop in
>> pgbouncer.0.5.precodegen.bc in Block {id: 25 name: %88}
>> LLVM IR Function @sbuf_continue in pgbouncer.0.5.precodegen.bc
>> in Block {id: 6 name: %17}
>> LLVM IR Function @activate_client in
>> pgbouncer.0.5.precodegen.bc in Block {id: 4 name: %27}
>> LLVM IR Function @reuse_on_release in
>> pgbouncer.0.5.precodegen.bc in Block {id: 1 name: %14}
>> LLVM IR Function @release_server in
>> pgbouncer.0.5.precodegen.bc in Block {id: 24 name: %103}
>> LLVM IR Function @handle_server_startup in
>> pgbouncer.0.5.precodegen.bc in Block {id: 39 name: %171}
>> LLVM IR Function @server_proto in pgbouncer.0.5.precodegen.bc
>> in Block {id: 20 name: %98}
>> LLVM IR Function @sbuf_call_proto in
>> pgbouncer.0.5.precodegen.bc in Block {id: 8 name: %28}
>> LLVM IR Function @sbuf_process_pending in
>> pgbouncer.0.5.precodegen.bc in Block {id: 10 name: %36}
>> LLVM IR Function @sbuf_main_loop in
>> pgbouncer.0.5.precodegen.bc in Block {id: 25 name: %88}
>> LLVM IR Function @sbuf_recv_cb in pgbouncer.0.5.precodegen.bc
>> in Block {id: 0 name: %3}
>>
>>
>> pgbouncer is dynamically linked to:
>>
>> ldd /tmp/pgbouncer-1.8.1/pgbouncer
>> linux-vdso.so.1 => (0x00007ffcb05d9000)
>> libevent-2.0.so.5 =>
>> /usr/lib/x86_64-linux-gnu/libevent-2.0.so.5 (0x00007f682b70e000)
>> libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007f682b344000)
>> libpthread.so.0 => /lib/x86_64-linux-gnu/libpthread.so.0
>> (0x00007f682b127000)
>> /lib64/ld-linux-x86-64.so.2 (0x00007f682b954000)
>>
>>
>> Even though I understood it was not necessary, I tried adding --lib
>> to all the libraries above that are on the system path, but result is
>> still the same.
>>
>> Any hint on how I can continue? I also tried using --lib with the
>> IR version of libevent, but that fails even before, while loading the IR
>> version of libevent:
>>
>> org.graalvm.launcher.Launcher$AbortException
>> Caused by: org.graalvm.polyglot.PolyglotException:
>> java.lang.IllegalArgumentException: load
>> "/tmp/libevent-2.1.8-stable/.libs/libevent-2.1.so.6.0.2.0.5.precodegen.bc"
>>
>> even though it is LLVM IR code:
>>
>> file
>> /tmp/libevent-2.1.8-stable/.libs/libevent-2.1.so.6.0.2.0.5.precodegen.bc
>> /tmp/libevent-2.1.8-stable/.libs/libevent-2.1.so.6.0.2.0.5.precodegen.bc:
>> LLVM IR bitcode
>>
>>
>> I'm not C or IR expert. I understand getrandom function is somehow
>> missing, but I don't see who should be providing it. Ideas are much
>> appreciated! Thank you,
>>
>>
>> Álvaro
>>
>>
>
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