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"[BUG] Bus Error" on OS X #2

jayzes opened this Issue Jun 16, 2009 · 4 comments

4 participants

jayzes commented Jun 16, 2009

Running OS X 10.5.6, ruby 1.8.6 (2008-03-03 patchlevel 114) [universal-darwin9.0], I keep getting bus errors when I try to profile my Rails app. Whenever the PerfTools::CpuProfiler.stop call runs, either by executing script/server with "CPUPROFILE=my_app_profile RUBYOPT="-rgem which perftools | tail -1" script/server" or using some custom hooks to start/stop profiling from a controller, I get a short and cryptic error message from mongrel as it crashes:

[BUG] Bus Error
ruby 1.8.6 (2008-03-03) [universal-darwin9.0]

<18 connection closed.
Abort trap

I'm a little stumped as to what else to look for - didn't see anything else in the README or Ilya's blog post, and while the GoRuCo talk mentions patching the Ruby interpreter I didn't see any instructions for that in the README. Any ideas as to what could be going on?


I'm getting the same thing as well on OS X using ruby 1.8.6 (2008-08-11 patchlevel 287) [universal-darwin9.0] .

jayzes commented Jun 17, 2009

One other update on this - I've noticed that it only happens when I try to profile multiple requests. If I set up the start/stop calls in an around filter and only profile a single request, it works fine. If I try multiple requests, I get the bus error.

jodosha commented Jun 21, 2009

Ran into the same issue, my ruby version is:
ruby 1.8.6 (2009-06-08 patchlevel 369) [i686-darwin9.7.0]

With the pl 287 this won't happen. I just tried to run the add_numbers_profile example.

tmm1 commented Oct 13, 2009

These segfaults should be fixed. Please open a new ticket if you run into more issues.

@tmm1 tmm1 added a commit that referenced this issue Aug 21, 2012
@tmm1 prevent explosions when stopping while paused
Breakpoint 1, CpuProfiler::DisableHandler (this=0x7fa1ce890ce0) at src/
271   RAW_CHECK(prof_handler_token_ != NULL, "SIGPROF handler is not registered");
Current language:  auto; currently c++

Program received signal SIGABRT, Aborted.
0x00007fa1d7df9ed5 in raise () from /lib/
(gdb) where
 #0  0x00007fa1d7df9ed5 in raise () from /lib/
 #1  0x00007fa1d7dfb3f3 in abort () from /lib/
 #2  0x00007fa1ce685634 in CpuProfiler::DisableHandler (this=0x7fa1ce890ce0) at src/
 #3  0x00007fa1ce6859b0 in CpuProfiler::Stop (this=0x7fa1ce890ce0) at src/
 #4  0x00007fa1ce685a2a in ~CpuProfiler (this=0x7fa1ce890ce0) at src/
 #5  0x00007fa1d7dfc9cd in exit () from /lib/
 #6  0x0000000000425310 in ruby_stop (ex=<value optimized out>) at eval.c:1689
 #7  0x000000000042dcd1 in ruby_run () at eval.c:1710
 #8  0x0000000000412063 in main (argc=9, argv=0x7fff08f9b6e8, envp=<value optimized out>) at main.c:48
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