{"action":"closed","issue":{"url":"https://api.github.com/repos/mozilla/rr/issues/1848","repository_url":"https://api.github.com/repos/mozilla/rr","labels_url":"https://api.github.com/repos/mozilla/rr/issues/1848/labels{/name}","comments_url":"https://api.github.com/repos/mozilla/rr/issues/1848/comments","events_url":"https://api.github.com/repos/mozilla/rr/issues/1848/events","html_url":"https://github.com/mozilla/rr/issues/1848","id":182795142,"number":1848,"title":"Firefox crashes under rr: \"Bad system call\"","user":{"login":"yan12125","id":1937689,"avatar_url":"https://avatars.githubusercontent.com/u/1937689?v=3","gravatar_id":"","url":"https://api.github.com/users/yan12125","html_url":"https://github.com/yan12125","followers_url":"https://api.github.com/users/yan12125/followers","following_url":"https://api.github.com/users/yan12125/following{/other_user}","gists_url":"https://api.github.com/users/yan12125/gists{/gist_id}","starred_url":"https://api.github.com/users/yan12125/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/yan12125/subscriptions","organizations_url":"https://api.github.com/users/yan12125/orgs","repos_url":"https://api.github.com/users/yan12125/repos","events_url":"https://api.github.com/users/yan12125/events{/privacy}","received_events_url":"https://api.github.com/users/yan12125/received_events","type":"User","site_admin":false},"labels":[],"state":"closed","locked":false,"assignee":{"login":"khuey","id":325892,"avatar_url":"https://avatars.githubusercontent.com/u/325892?v=3","gravatar_id":"","url":"https://api.github.com/users/khuey","html_url":"https://github.com/khuey","followers_url":"https://api.github.com/users/khuey/followers","following_url":"https://api.github.com/users/khuey/following{/other_user}","gists_url":"https://api.github.com/users/khuey/gists{/gist_id}","starred_url":"https://api.github.com/users/khuey/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/khuey/subscriptions","organizations_url":"https://api.github.com/users/khuey/orgs","repos_url":"https://api.github.com/users/khuey/repos","events_url":"https://api.github.com/users/khuey/events{/privacy}","received_events_url":"https://api.github.com/users/khuey/received_events","type":"User","site_admin":false},"assignees":[{"login":"khuey","id":325892,"avatar_url":"https://avatars.githubusercontent.com/u/325892?v=3","gravatar_id":"","url":"https://api.github.com/users/khuey","html_url":"https://github.com/khuey","followers_url":"https://api.github.com/users/khuey/followers","following_url":"https://api.github.com/users/khuey/following{/other_user}","gists_url":"https://api.github.com/users/khuey/gists{/gist_id}","starred_url":"https://api.github.com/users/khuey/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/khuey/subscriptions","organizations_url":"https://api.github.com/users/khuey/orgs","repos_url":"https://api.github.com/users/khuey/repos","events_url":"https://api.github.com/users/khuey/events{/privacy}","received_events_url":"https://api.github.com/users/khuey/received_events","type":"User","site_admin":false}],"milestone":null,"comments":19,"created_at":"2016-10-13T13:50:34Z","updated_at":"2016-10-19T02:38:50Z","closed_at":"2016-10-19T02:38:50Z","body":"I was trying to get a trace of Firefox. When e10s is enabled, the content process always crashes with SIGSYS. Here's the replay log:\r\n```\r\n$ rr replay -p plugin-container\r\nATTENTION: default value of option force_s3tc_enable overridden by environment.\r\nGNU gdb (GDB) 7.12\r\nCopyright (C) 2016 Free Software Foundation, Inc.\r\nLicense GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>\r\nThis is free software: you are free to change and redistribute it.\r\nThere is NO WARRANTY, to the extent permitted by law.  Type \"show copying\"\r\nand \"show warranty\" for details.\r\nThis GDB was configured as \"x86_64-pc-linux-gnu\".\r\nType \"show configuration\" for configuration details.\r\nFor bug reporting instructions, please see:\r\n<http://www.gnu.org/software/gdb/bugs/>.\r\nFind the GDB manual and other documentation resources online at:\r\n<http://www.gnu.org/software/gdb/documentation/>.\r\nFor help, type \"help\".\r\nType \"apropos word\" to search for commands related to \"word\"...\r\nReading symbols from /home/yen/.local/share/rr/latest-trace/mmap_hardlink_625_plugin-container...done.\r\nwarning: File \"/home/yen/Projects/mozilla-central/.gdbinit\" auto-loading has been declined by your `auto-load safe-path' set to \"$debugdir:$datadir/auto-load\".\r\nTo enable execution of this file add\r\n        add-auto-load-safe-path /home/yen/Projects/mozilla-central/.gdbinit\r\nline to your configuration file \"/home/yen/.gdbinit\".\r\nTo completely disable this security protection add\r\n        set auto-load safe-path /\r\nline to your configuration file \"/home/yen/.gdbinit\".\r\nFor more information about this security protection see the\r\n\"Auto-loading safe path\" section in the GDB manual.  E.g., run from the shell:\r\n        info \"(gdb)Auto-loading safe path\"\r\nReally redefine built-in command \"restart\"? (y or n) [answered Y; input not from terminal]\r\n>>> >>> >>> >>> ... ... >>> ... ... >>> ... ... ... \r\n>>> \r\nRemote debugging using :20898\r\n\r\n--------------------------------------------------\r\n ---> Reached target process 20666 at event 6690.\r\n--------------------------------------------------\r\nwarning: unable to open /proc file '/proc/20666/task/20666/maps'\r\nwarning: remote target does not support file transfer, attempting to access files from local filesystem.\r\nReading symbols from /lib64/ld-linux-x86-64.so.2...(no debugging symbols found)...done.\r\n---Type <return> to continue, or q <return> to quit---\r\n0x00007fd7a8ba4d70 in _start () from /lib64/ld-linux-x86-64.so.2\r\n(rr) c\r\nContinuing.\r\nwarning: Could not load shared library symbols for linux-vdso.so.1.\r\nDo you need \"set solib-search-path\" or \"set sysroot\"?\r\nwarning: File \"/home/yen/Projects/mozilla-central/obj-x86_64-pc-linux-gnu/toolkit/library/libxul.so-gdb.py\" auto-loading has been declined by your `auto-load safe-path' set to \"$debugdir:$datadir/auto-load\".\r\n[New Thread 20666.20671]\r\n[New Thread 20666.20688]\r\n[New Thread 20666.20689]\r\n[New Thread 20666.20690]\r\n[New Thread 20666.20691]\r\n[New Thread 20666.20692]\r\n[New Thread 20666.20693]\r\n[New Thread 20666.20694]\r\n[New Thread 20666.20696]\r\n[New Thread 20666.20697]\r\n[New Thread 20666.20698]\r\n[New Thread 20666.20705]\r\n[New Thread 20666.20706]\r\n[New Thread 20666.20707]\r\n[New Thread 20666.20708]\r\n[New Thread 20666.20710]\r\n[New Thread 20666.20711]\r\n[New Thread 20666.20712]\r\n[New Thread 20666.20713]\r\n\r\nThread 1 received signal SIGSYS, Bad system call.\r\n0x0000000070000005 in ?? ()\r\n(rr) bt\r\n#0  0x0000000070000005 in  ()\r\n#1  0x00007fd7a897b018 in  () at /usr/bin/../lib/rr/librrpreload.so\r\n#2  0x00007fd7a8978fe1 in  () at /usr/bin/../lib/rr/librrpreload.so\r\n#3  0x00007fd7a897b04a in  () at /usr/bin/../lib/rr/librrpreload.so\r\n(rr) info threads \r\n  Id   Target Id         Frame \r\n* 1    Thread 20666.20666 (Web Content) 0x0000000070000005 in ?? ()\r\n  2    Thread 20666.20671 (Chrome_ChildThr) 0x0000000070000002 in ?? ()\r\n  3    Thread 20666.20688 (JS Watchdog) 0x00007fd7a87674b8 in pthread_cond_timedwait@@GLIBC_2.3.2 ()\r\n   from /usr/lib/libpthread.so.0\r\n  4    Thread 20666.20689 (JS Helper) 0x00007fd7a876710f in pthread_cond_wait@@GLIBC_2.3.2 ()\r\n   from /usr/lib/libpthread.so.0\r\n  5    Thread 20666.20690 (JS Helper) 0x00007fd7a876710f in pthread_cond_wait@@GLIBC_2.3.2 ()\r\n   from /usr/lib/libpthread.so.0\r\n  6    Thread 20666.20691 (JS Helper) 0x00007fd7a876710f in pthread_cond_wait@@GLIBC_2.3.2 ()\r\n   from /usr/lib/libpthread.so.0\r\n  7    Thread 20666.20692 (JS Helper) 0x00007fd7a876710f in pthread_cond_wait@@GLIBC_2.3.2 ()\r\n   from /usr/lib/libpthread.so.0\r\n  8    Thread 20666.20693 (JS Helper) 0x00007fd7a876710f in pthread_cond_wait@@GLIBC_2.3.2 ()\r\n   from /usr/lib/libpthread.so.0\r\n  9    Thread 20666.20694 (Socket Thread) 0x000000007000000e in ?? ()\r\n  10   Thread 20666.20696 (Hang Monitor) 0x00007fd7a876710f in pthread_cond_wait@@GLIBC_2.3.2 ()\r\n   from /usr/lib/libpthread.so.0\r\n  11   Thread 20666.20697 (BgHangManager) 0x00007fd7a876710f in pthread_cond_wait@@GLIBC_2.3.2 ()\r\n   from /usr/lib/libpthread.so.0\r\n  12   Thread 20666.20698 (Timer) 0x00007fd7a87674b8 in pthread_cond_timedwait@@GLIBC_2.3.2 ()\r\n   from /usr/lib/libpthread.so.0\r\n  13   Thread 20666.20705 (ImgDecoder #1) 0x00007fd7a876710f in pthread_cond_wait@@GLIBC_2.3.2 ()\r\n   from /usr/lib/libpthread.so.0\r\n  14   Thread 20666.20706 (ImgDecoder #2) 0x00007fd7a876710f in pthread_cond_wait@@GLIBC_2.3.2 ()\r\n---Type <return> to continue, or q <return> to quit---\r\n   from /usr/lib/libpthread.so.0\r\n  15   Thread 20666.20707 (ImgDecoder #3) 0x00007fd7a876710f in pthread_cond_wait@@GLIBC_2.3.2 ()\r\n   from /usr/lib/libpthread.so.0\r\n  16   Thread 20666.20708 (ImageIO) 0x00007fd7a876710f in pthread_cond_wait@@GLIBC_2.3.2 ()\r\n   from /usr/lib/libpthread.so.0\r\n  17   Thread 20666.20710 (gmain) 0x000000007000000e in ?? ()\r\n  18   Thread 20666.20711 (ImageBridgeChil) 0x00007fd7a876710f in pthread_cond_wait@@GLIBC_2.3.2 ()\r\n   from /usr/lib/libpthread.so.0\r\n  19   Thread 20666.20712 (threaded-ml) 0x000000007000000e in ?? ()\r\n  20   Thread 20666.20713 (ProcessHangMoni) 0x00007fd7a876710f in pthread_cond_wait@@GLIBC_2.3.2 ()\r\n   from /usr/lib/libpthread.so.0\r\n(rr)\r\n```\r\nMy environment:\r\n* rr: 4.4.0.r10.g58fd04d-1\r\n* Arch Linux x86_64\r\n* Kernel 4.8.1\r\n* Firefox: mozilla-central [f03e2740d604](https://hg.mozilla.org/mozilla-central/rev/f03e2740d604), built from source"}}
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