Re: [patch 1/2] oProfile: oops when profile_pc() return ~0LU

[Sami Farin <safari-kernel@safari.iki.fi>]

On Mon, Oct 22, 2007 at 19:38:10 -0700, Linus Torvalds wrote:
> 
> This set of two patches look ok by me, but I'd like sign-offs.. Also, were 
> they tested and found to fix the problem by Sami?
> 
> 		Linus

The previous patch I tested by Philippe, oprof-fix-profile_pc-use.patch,
worked ok, but with this latest patch oprofiled aborts.
But kernel does not oops or print msgs.

(gdb) bt
#0  0x00007f68d66fee65 in raise () from /lib64/libc.so.6
#1  0x00007f68d6700910 in abort () from /lib64/libc.so.6
#2  0x00007f68d7053974 in code_unknown (trans=0x7fff5bcd1c60) at opd_trans.c:140
#3  0x00007f68d7053eff in opd_process_samples (buffer=0x7f68d6ef3010 "��������\002", count=99349) at opd_trans.c:362
#4  0x00007f68d7050408 in opd_do_samples (opd_buf=0x7f68d6ef3010 "��������\002", count=794792) at init.c:131
#5  0x00007f68d70504e9 in opd_do_read (buf=0x7f68d6ef3010 "��������\002", size=1048576) at init.c:181
#6  0x00007f68d70506ca in opd_26_start () at init.c:265
#7  0x00007f68d7051468 in main (argc=9, argv=0x7fff5bcd1e98) at oprofiled.c:501

(gdb) frame 2
#2  0x00007f68d7053974 in code_unknown (trans=0x7fff5bcd1c60) at opd_trans.c:140
140             abort();

(gdb) p *trans
$1 = {buffer = 0x7f68d6ef3c38 "�)\200����", remaining = 98960, tracing = TRACING_OFF, current = 0x7f68d89dd010, last = 0x7f68d89dd010, anon = 0x0, 
  last_anon = 0x0, cookie = 18446604436320244048, app_cookie = 18446604436320244048, pc = 18446744071568019675, last_pc = 18446744071568019675, 
  event = 5, in_kernel = 1, cpu = 1, tid = 10074, tgid = 10074, embedded_offset = 18446744073709551615}
(gdb) 

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