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Red Hat Bugzilla – Attachment 203621 Details for
Bug 289411
Failure to attach to a pthread
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SystemTap nonintrusive ptrace(2) && wait4(2) tracer.
ptrace.stp (text/plain), 2.89 KB, created by
Jan Kratochvil
on 2007-09-23 22:47:52 UTC
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Description:
SystemTap nonintrusive ptrace(2) && wait4(2) tracer.
Filename:
MIME Type:
Creator:
Jan Kratochvil
Created:
2007-09-23 22:47:52 UTC
Size:
2.89 KB
patch
obsolete
>probe begin >{ > print ("START\n") >} >global ptrace_enter >probe syscall.ptrace >{ > request_name = "" > if ($request == 0) > request_name = "PTRACE_TRACEME" > else if ($request == 1) > Xrequest_name = "PTRACE_PEEKTEXT" > else if ($request == 2) > Xrequest_name = "PTRACE_PEEKDATA" > else if ($request == 3) > Xrequest_name = "PTRACE_PEEKUSR" > else if ($request == 4) > Xrequest_name = "PTRACE_POKETEXT" > else if ($request == 5) > Xrequest_name = "PTRACE_POKEDATA" > else if ($request == 6) > Xrequest_name = "PTRACE_POKEUSR" > else if ($request == 7) > request_name = "PTRACE_CONT" > else if ($request == 8) > request_name = "PTRACE_KILL" > else if ($request == 9) > request_name = "PTRACE_SINGLESTEP" > else if ($request == 16) > request_name = "PTRACE_ATTACH" > else if ($request == 17) > request_name = "PTRACE_DETACH" > else if ($request == 24) > request_name = "PTRACE_SYSCALL" > else if ($request == 0x4200) > request_name = "PTRACE_SETOPTIONS" > else if ($request == 0x4201) > request_name = "PTRACE_GETEVENTMSG" > else if ($request == 0x4202) > request_name = "PTRACE_GETSIGINFO" > else if ($request == 0x4203) > request_name = "PTRACE_SETSIGINFO" > else > request_name = sprintf ("0x%x", $request) > if (request_name == "") > ptrace_enter = "" > else > ptrace_enter = sprintf ("%s (%d, 0x%x, 0x%x)", request_name, $pid, $addr, $data) >} >probe syscall.ptrace.return >{ > # 2 => hex > if (ptrace_enter != "") > print (ptrace_enter." = ".returnstr (2)."\n") >} >global wait4_enter > >function get_uint:long (addr:long) >%{ > int __user *addr = (int *) (unsigned long) THIS->addr; > unsigned int retval; > > if (get_user (retval, addr)) > THIS->__retvalue = -1L; > else > THIS->__retvalue = retval; >%} > >global wait4_stat_addr >probe kernel.function("sys_wait4") >{ > wait4_stat_addr = $stat_addr > wait4_enter = sprintf ("wait4 (%d, 0x%x)", $pid, $options) >} >probe kernel.function("sys_wait4").return >{ > if (wait4_enter != "") > { > if (wait4_stat_addr == 0) > status = "NULL" > else > { > status_long = get_uint (wait4_stat_addr) > if (status_long == -1) > status = sprintf ("ERR*0x%x", wait4_stat_addr) > else > status = sprintf ("0x%x", status_long) > } > printf ("%s = (status %s) %s\n", wait4_enter, status, returnstr (1)) > } >} > >global kill_enter >probe kernel.function("sys_kill") >{ > kill_enter = sprintf ("kill (%d, sig %d)", $pid, $sig); >} >probe kernel.function("sys_kill").return >{ > if (kill_enter != "") > printf ("%s = %s\n", kill_enter, returnstr (1)) >} > >global tkill_enter >probe kernel.function("sys_tkill") >{ > tkill_enter = sprintf ("tkill (%d, sig %d)", $pid, $sig); >} >probe kernel.function("sys_tkill").return >{ > if (tkill_enter != "") > printf ("%s = %s\n", tkill_enter, returnstr (1)) >} > >global tgkill_enter >probe kernel.function("sys_tgkill") >{ > tgkill_enter = sprintf ("tgkill (tgid %d, tid %d, sig %d)", $tgid, $pid, $sig); >} >probe kernel.function("sys_tgkill").return >{ > if (tgkill_enter != "") > printf ("%s = %s\n", tgkill_enter, returnstr (1)) >}
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