examples/httpserver collapse #937

6643 · 2016-06-15T10:33:05Z

if@mint ~/Documents/ponyc/examples/httpserver $ ./httpserver 
Listening on 127.0.0.1:50000
localhost - - [15/Jun/2016:10:28:23 +0000] "GET / HTTP/1.1" 200 15 "" "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Ubuntu Chromium/50.0.2661.102 Chrome/50.0.2661.102 Safari/537.36"
localhost - - [15/Jun/2016:10:28:23 +0000] "GET /favicon.ico HTTP/1.1" 200 26 "" "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Ubuntu Chromium/50.0.2661.102 Chrome/50.0.2661.102 Safari/537.36"
localhost - - [15/Jun/2016:10:28:29 +0000] "GET / HTTP/1.1" 200 15 "" "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Ubuntu Chromium/50.0.2661.102 Chrome/50.0.2661.102 Safari/537.36"
localhost - - [15/Jun/2016:10:28:29 +0000] "GET /favicon.ico HTTP/1.1" 200 26 "" "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Ubuntu Chromium/50.0.2661.102 Chrome/50.0.2661.102 Safari/537.36"
localhost - - [15/Jun/2016:10:28:29 +0000] "GET / HTTP/1.1" 200 15 "" "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Ubuntu Chromium/50.0.2661.102 Chrome/50.0.2661.102 Safari/537.36"
localhost - - [15/Jun/2016:10:28:30 +0000] "GET /favicon.ico HTTP/1.1" 200 26 "" "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Ubuntu Chromium/50.0.2661.102 Chrome/50.0.2661.102 Safari/537.36"
localhost - - [15/Jun/2016:10:28:30 +0000] "GET / HTTP/1.1" 200 15 "" "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Ubuntu Chromium/50.0.2661.102 Chrome/50.0.2661.102 Safari/537.36"
localhost - - [15/Jun/2016:10:28:30 +0000] "GET /favicon.ico HTTP/1.1" 200 26 "" "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Ubuntu Chromium/50.0.2661.102 Chrome/50.0.2661.102 Safari/537.36"
localhost - - [15/Jun/2016:10:28:30 +0000] "GET / HTTP/1.1" 200 15 "" "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Ubuntu Chromium/50.0.2661.102 Chrome/50.0.2661.102 Safari/537.36"
localhost - - [15/Jun/2016:10:28:30 +0000] "GET / HTTP/1.1" 200 15 "" "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Ubuntu Chromium/50.0.2661.102 Chrome/50.0.2661.102 Safari/537.36"
localhost - - [15/Jun/2016:10:28:30 +0000] "GET / HTTP/1.1" 200 15 "" "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Ubuntu Chromium/50.0.2661.102 Chrome/50.0.2661.102 Safari/537.36"
localhost - - [15/Jun/2016:10:28:30 +0000] "GET /favicon.ico HTTP/1.1" 200 26 "" "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Ubuntu Chromium/50.0.2661.102 Chrome/50.0.2661.102 Safari/537.36"
localhost - - [15/Jun/2016:10:28:30 +0000] "GET / HTTP/1.1" 200 15 "" "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Ubuntu Chromium/50.0.2661.102 Chrome/50.0.2661.102 Safari/537.36"
localhost - - [15/Jun/2016:10:28:30 +0000] "GET /favicon.ico HTTP/1.1" 200 26 "" "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Ubuntu Chromium/50.0.2661.102 Chrome/50.0.2661.102 Safari/537.36"
localhost - - [15/Jun/2016:10:28:30 +0000] "GET / HTTP/1.1" 200 15 "" "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Ubuntu Chromium/50.0.2661.102 Chrome/50.0.2661.102 Safari/537.36"
localhost - - [15/Jun/2016:10:28:30 +0000] "GET /favicon.ico HTTP/1.1" 200 26 "" "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Ubuntu Chromium/50.0.2661.102 Chrome/50.0.2661.102 Safari/537.36"
localhost - - [15/Jun/2016:10:28:30 +0000] "GET / HTTP/1.1" 200 15 "" "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Ubuntu Chromium/50.0.2661.102 Chrome/50.0.2661.102 Safari/537.36"
localhost - - [15/Jun/2016:10:28:30 +0000] "GET / HTTP/1.1" 200 15 "" "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Ubuntu Chromium/50.0.2661.102 Chrome/50.0.2661.102 Safari/537.36"
localhost - - [15/Jun/2016:10:28:30 +0000] "GET / HTTP/1.1" 200 15 "" "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Ubuntu Chromium/50.0.2661.102 Chrome/50.0.2661.102 Safari/537.36"
localhost - - [15/Jun/2016:10:28:30 +0000] "GET /favicon.ico HTTP/1.1" 200 26 "" "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Ubuntu Chromium/50.0.2661.102 Chrome/50.0.2661.102 Safari/537.36"
localhost - - [15/Jun/2016:10:28:30 +0000] "GET / HTTP/1.1" 200 15 "" "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Ubuntu Chromium/50.0.2661.102 Chrome/50.0.2661.102 Safari/537.36"
localhost - - [15/Jun/2016:10:28:30 +0000] "GET / HTTP/1.1" 200 15 "" "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Ubuntu Chromium/50.0.2661.102 Chrome/50.0.2661.102 Safari/537.36"
localhost - - [15/Jun/2016:10:28:30 +0000] "GET / HTTP/1.1" 200 15 "" "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Ubuntu Chromium/50.0.2661.102 Chrome/50.0.2661.102 Safari/537.36"
httpserver: src/libponyrt/gc/gc.c:360: mark_remote_object: Assertion `mutability != PONY_TRACE_MUTABLE' failed.
Aborted

The text was updated successfully, but these errors were encountered:

SeanTAllen · 2016-06-15T18:00:31Z

I haven't been able to reproduce this. Is this something you can easily reproduce?

6643 · 2016-06-15T19:22:12Z

@SeanTAllen
has been in the press f5 to refresh the browser will appear

SeanTAllen · 2016-06-15T19:54:10Z

what platform are you running on? if on linux, which distro?

what version of pony?

what version of llvm?

6643 · 2016-06-15T20:15:30Z

@SeanTAllen

linuxmint18
0.2.1-946-ge992d20
llvm-3.6

6643 · 2016-07-04T00:10:45Z

Remove logger no longer crashes

SeanTAllen · 2016-07-07T12:28:54Z

Where you using VirtualBox?

Can you try again using the latest ponyc from masteR?

6643 · 2016-07-08T00:58:26Z

linuxmint18

siege -c 100 -r 100 http://127.0.0.1:50000/

if@mint ~/Documents/ponyc/examples/httpserver $ ponyc -v
0.2.1-988-g4e0a773 [debug]

localhost - - [08/Jul/2016:00:52:10 +0000] "GET / HTTP/1.1" 200 15 "" "Mozilla/5.0 (pc-x86_64-linux-gnu) Siege/3.0.8"
localhost - - [08/Jul/2016:00:52:10 +0000] "GET / HTTP/1.1" 200 15 "" "Mozilla/5.0 (pc-x86_64-linux-gnu) Siege/3.0.8"
localhost - - [08/Jul/2016:00:52:10 +0000] "GET / HTTP/1.1" 200 15 "" "Mozilla/5.0 (pc-x86_64-linux-gnu) Siege/3.0.8"
localhost - - [08/Jul/2016:00:52:10 +0000] "GET / HTTP/1.1" 200 15 "" "Mozilla/5.0 (pc-x86_64-linux-gnu) Siege/3.0.8"
localhost - - [08/Jul/2016:00:52:10 +0000] "GET / HTTP/1.1" 200 15 "" "Mozilla/5.0 (pc-x86_64-linux-gnu) Siege/3.0.8"
localhost - - [08/Jul/2016:00:52:10 +0000] "GET / HTTP/1.1" 200 15 "" "Mozilla/5.0 (pc-x86_64-linux-gnu) Siege/3.0.8"
localhost - - [08/Jul/2016:00:52:10 +0000] "GET / HTTP/1.1" 200 15 "" "Mozilla/5.0 (pc-x86_64-linux-gnu) Siege/3.0.8"
localhost - - [08/Jul/2016:00:52:10 +0000] "GET / HTTP/1.1" 200 15 "" "Mozilla/5.0 (pc-x86_64-linux-gnu) Siege/3.0.8"
localhost - - [08/Jul/2016:00:52:10 +0000] "GET / HTTP/1.1" 200 15 "" "Mozilla/5.0 (pc-x86_64-linux-gnu) Siege/3.0.8"
localhost - - [08/Jul/2016:00:52:10 +0000] "GET / HTTP/1.1" 200 15 "" "Mozilla/5.0 (pc-x86_64-linux-gnu) Siege/3.0.8"
localhost - - [08/Jul/2016:00:52:10 +0000] "GET / HTTP/1.1" 200 15 "" "Mozilla/5.0 (pc-x86_64-linux-gnu) Siege/3.0.8"
localhost - - [08/Jul/2016:00:52:10 +0000] "GET / HTTP/1.1" 200 15 "" "Mozilla/5.0 (pc-x86_64-linux-gnu) Siege/3.0.8"
localhost - - [08/Jul/2016:00:52:10 +0000] "GET / HTTP/1.1" 200 15 "" "Mozilla/5.0 (pc-x86_64-linux-gnu) Siege/3.0.8"
Segmentation fault

Theodus · 2016-08-01T18:00:37Z

I can confirm the Segmentation fault result on Linux Mint 18 with the latest version of ponyc (1e96984) and llvm 3.8.0. It should also be noted that I ran siege from a separate computer.

Theodus · 2016-08-01T18:08:31Z

Running lldb gives this result:

Process 8925 stopped
* thread #6: tid = 8931, 0x0000000000428f43 httpserver`pony_traceunknown + 3, name = 'httpserver', stop reason = signal SIGSEGV: invalid address (fault address: 0x0)
    frame #0: 0x0000000000428f43 httpserver`pony_traceunknown + 3
httpserver`pony_traceunknown:
->  0x428f43 <+3>:  cmpq   $0x0, 0x40(%rax)
    0x428f48 <+8>:  je     0x428f50                  ; <+16>
    0x428f4a <+10>: jmpq   *0x18(%rdi)
    0x428f4d <+13>: nopl   (%rax)

SeanTAllen · 2016-08-03T16:12:13Z

out of curiousity. @Theodus could you apply

WallarooLabs@4ead6e0

and run this again and see if the bug still exists. I assume it does, but... I'm wondering if it might fix. Mostly shot in the dark.

Theodus · 2016-08-03T17:53:02Z

@SeanTAllen, it made no difference. It was worth a shot though.

Perelandric · 2016-08-06T00:00:31Z

I get the same behavior, and using DiscardLog or removing logging altogether from the HTTP package makes no difference.

I'm on LinuxMint 17.3 with LLVM 3.6.

I did some digging, and was able to eliminate the seg fault by screwing around with the code in the received() method in _request_builder.pony. My edits wouldn't be correct code, but the nature of what does and does not eliminate the seg fault was interesting.

It's a little long to describe, so I put it into a gist. Hope it helps.

IngoHohmann · 2016-09-08T19:25:22Z

./httpserver
Listening on 127.0.0.1:50000
fume.fritz.box - - [08/Sep/2016:19:16:15 +0000] "GET /xxx HTTP/1.1" 200 18 "" "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/53.0.2785.92 Safari/537.36"
fume.fritz.box - - [08/Sep/2016:19:16:16 +0000] "GET /favicon.ico HTTP/1.1" 200 26 "" "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/53.0.2785.92 Safari/537.36"
fume.fritz.box - - [08/Sep/2016:19:16:22 +0000] "GET /xxx HTTP/1.1" 200 18 "" "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/53.0.2785.92 Safari/537.36"
fish: './httpserver' terminated by signal SIGSEGV (Adressbereichsfehler)

It happens consistently on the 3. get, on a 32 bit Linux machine

Distributor ID: ManjaroLinux
Release: 16.08
Codename: Ellada

ponyc --version
0.3.0 [release]

llvm-config --version
3.8.1

SeanTAllen · 2016-10-15T19:59:12Z

Looking at this, I'm pretty sure this is the same bug as #1118. I can't imagine we have two bugs that result in crashes in trackunknown. @sylvanc would you agree?

SeanTAllen · 2016-10-15T19:59:49Z

@Theodus can you verify you still get this with the latest master and using llvm 3.8.1?

Theodus · 2016-10-15T20:31:36Z

@SeanTAllen I get the same segfault.

0.5.0-8011ddf [release] (llvm 3.8.1) (cc (Ubuntu 5.4.0-6ubuntu1~16.04.2) 5.4.0 20160609)

SeanTAllen · 2016-10-15T20:49:44Z

Thanks. Just wanted to verify @Theodus.

SeanTAllen · 2016-10-19T20:31:23Z

We are assuming this is the same issue as #1118 and once that is fixed, will test this again to verify.

Theodus · 2016-11-12T18:28:44Z

I have not been able to reproduce this with recent versions of Pony.

SeanTAllen · 2016-11-12T18:30:52Z

interesting

jemc · 2016-11-12T21:58:16Z

Could it have been fixed by #1321 or #1405?

Praetonus · 2016-11-12T22:14:23Z

@jemc That's very unlikely for #1321 and definitely not #1405.

Perelandric · 2016-11-13T22:14:14Z

Commit f9591b2 seems to be the first commit that doesn't segfault.

Praetonus · 2016-11-15T03:04:37Z

@Perelandric That's interesting. I guess there is a bug somewhere in the code generation for GC tracing. I'll look into it.

SeanTAllen · 2017-04-29T22:11:26Z

I'm closing this because I think its fixed based on the above comments.

SeanTAllen added the needs discussion label Jun 22, 2016

This was referenced Jun 26, 2016

Use embed fields in stdlib objects when possible #978

Merged

Assigning a remote embedded field to a local field causes assertion failure in GC marking #979

Closed

6643 mentioned this issue Jul 4, 2016

Segmentation fault in examples/httpserver #996

Closed

Perelandric mentioned this issue Aug 8, 2016

Segmentation fault when actor receives a reference to itself via a class created in a different actor. #1118

Closed

SeanTAllen removed the needs discussion label Sep 27, 2016

SeanTAllen added bug: 1 - needs investigation triggers release Major issue that when fixed, results in an "emergency" release labels Oct 15, 2016

SeanTAllen removed the needs discussion during sync label Oct 19, 2016

SeanTAllen closed this as completed Apr 29, 2017

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examples/httpserver collapse #937

examples/httpserver collapse #937

6643 commented Jun 15, 2016 •

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Perelandric commented Aug 6, 2016

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Theodus commented Oct 15, 2016

SeanTAllen commented Oct 15, 2016

SeanTAllen commented Oct 19, 2016

Theodus commented Nov 12, 2016

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jemc commented Nov 12, 2016

Praetonus commented Nov 12, 2016

Perelandric commented Nov 13, 2016

Praetonus commented Nov 15, 2016

SeanTAllen commented Apr 29, 2017

examples/httpserver collapse #937

examples/httpserver collapse #937

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