Denys Vlasenko [Mon, 23 Feb 2009 08:07:45 +0000 (08:07 +0000)]
More cleanups from Mike Frysingler:
README: update an URL
.gitignore: added
config.guess config.sub install-sh: removed, they are revenerated
by autoconf anyway
Denys Vlasenko [Fri, 20 Feb 2009 17:38:47 +0000 (17:38 +0000)]
Further signalent.h cleanup.
* linux/ia64/signalent.h: Remove, it is identical to common signalent.h
sans "SIGRTnn" definitions which are redundant.
* linux/powerpc/signalent.h: Remove, it is identical to common signalent.h
sans outdated "SIGUNUSED" which should be "SIGSYS".
* linux/s390/signalent.h: Ditto.
* linux/s390x/signalent.h: Ditto.
* Makefile.am: Remove references to the above files.
Denys Vlasenko [Fri, 20 Feb 2009 16:24:39 +0000 (16:24 +0000)]
Patch by Mike Frysinger (vapier AT gentoo.org).
* Makefile.am: Remove reference to linux/sh/signalent.h.
* linux/sh/signalent.h: Remove, it is identical to common signalent.h.
Denys Vlasenko [Fri, 20 Feb 2009 16:00:41 +0000 (16:00 +0000)]
Patch by Mike Frysinger (vapier AT gentoo.org).
* linux/errnoent.h: Make ERRNO_58 show EDEADLOCK for POWERPC.
* Makefile.am: Remove reference to linux/powerpc/errnoent.h.
* linux/powerpc/errnoent.h: Remove, we can use common errnoent.h now.
Denys Vlasenko [Tue, 10 Feb 2009 16:03:20 +0000 (16:03 +0000)]
Cleanup after tcb table expansion simplification.
There was code which was trying to continue tracing
even if table expansion fails. Now we treat it as fatal
failure, so this code is removed by this change.
* defs.h: Delete TCB_FOLLOWFORK constant.
* process.c: Delete fork_tcb() and all calls of it.
* strace.c (startup_attach): Remove usage of TCB_FOLLOWFORK.
* syscall.c: Indent preprocessor directives.
Denys Vlasenko [Mon, 9 Feb 2009 18:55:59 +0000 (18:55 +0000)]
* defs.h: Correct the comment about TCB_SUSPENDED.
* strace.c: Fix misplaced #endif.
* util.c: Indent preprocessor directives, mark code parts
which can never be reached by compilation because of
the combination of #if directives. These are likely dead code,
I want to remove them later.
Denys Vlasenko [Thu, 29 Jan 2009 20:38:20 +0000 (20:38 +0000)]
* strace.c (newoutf): Prevent -o FILENAME overflowing the stack.
(startup_attach): Fix wrong pid in "Process <PID> attached".
(handle_group_exit): Do not consider exit to be spurious if
tcb has TCB_STARTUP bit set - we can attach to the task
right before its death, it can legitimately happen.
(handle_stopped_tcbs): Ditto.
Denys Vlasenko [Wed, 28 Jan 2009 19:00:54 +0000 (19:00 +0000)]
* process.c (internal_clone): Check and complain if pid value
looks insane.
* strace.c (alloc_tcb): Clear *all* fields in reused tcb.
(main): Query and remember uname() info on startup.
(handle_stopped_tcbs): Do not use PTRACE_SETOPTIONS on Linux < 2.6.29.
(printleader): Correct printing of "<unavailable>" markers.
Denys Vlasenko [Fri, 23 Jan 2009 16:10:22 +0000 (16:10 +0000)]
By Michal Nowak <mnowak@redhat.com>:
* mem.c (print_ldt_entry): Fix warning:
Format '%#08lx' expects type 'long unsigned int', but
argument 2 was type 'unsigned int'.
Denys Vlasenko [Wed, 21 Jan 2009 19:05:43 +0000 (19:05 +0000)]
* strace.c (collect_stopped_tcbs): Do not return NULL when ECHILD
is detected, return collected list instead. Fixes symptom when
the last "+++ killed by SIGxxx +++" is not printed.
Denys Vlasenko [Sat, 17 Jan 2009 01:52:54 +0000 (01:52 +0000)]
Two cleanups: tcb table expansion failure is not really a survivable
event, we do not have any viable way to continue. No wonder most
places where that is detected have FIXMEs.
It's way simpler to treat as fatal failure, and handle it inside
tcb table expansion finctions.
Second cleanup: tidy up haphazard locations of a few externs.
* defs.h: Change return type of expand_tcbtab() to void.
Declare change_syscall().
* process.c: Change all callsites of alloctcb(), alloc_tcb() and
fork_tcb(), removing now-redundant error checks.
(fork_tcb): Change return type to void - it can't fail now.
* strace.c: Move extern declarations out of function bodies.
Change all callsites of alloctcb(), alloc_tcb() and
fork_tcb(), removing now-redundant error checks.
(expand_tcbtab): Change return type to void - it can't fail now.
On failure to expand, print a message, clean up, and exit.
(alloc_tcb): On failure to expand, print a message, clean up, and exit.
* util.c (setbpt): Remove extern declaration from function body.
Denys Vlasenko [Sat, 17 Jan 2009 01:06:18 +0000 (01:06 +0000)]
* defs.h: Update a comment. No code changes.
* strace.c (handle_stopped_tcbs): Discard all execve stops
and clear TCB_WAITEXECVE bit.
* syscall.c (get_scno): Add the code to not mistakenly
treat ptrace stop as execve stop (execve stops can be blocked
by traced program).
Fixes RH#477775 "strace hangs if the target process blocks SIGTRAP".
Denys Vlasenko [Sat, 17 Jan 2009 00:21:31 +0000 (00:21 +0000)]
* process.c: Add a comment. No code changes.
* strace.c (collect_stopped_tcbs): Stop reversing list of stopped
tcp's. I'm not totally convinced it is crucial, but this is surely
fits the concept of "least surprise".
Do not collect TCB_SUSPENDED tcp's (this is closer to how
it was before).
(handle_stopped_tcbs): Remove the code to reject TCB_SUSPENDED tcp's,
it's done earlier now. In an unobvious way, this was causing
SIGSTOPs from freshly attached children to be misinterpreted.
Denys Vlasenko [Fri, 9 Jan 2009 17:22:56 +0000 (17:22 +0000)]
* defs.h: Add new struct tcb fields: wait_status, next_need_service.
make flags field wider (ints are easier to work with on many CPUs).
* strace.c (trace): Split this function into two:
collect_stopped_tcbs() and handle_stopped_tcbs().
Now we collect *all* waitable tasks, then handle them all,
then repeat.
Fixes RH#478419 "Some threads stop when strace with -f option
is executed on a multi-thread process"
* test/many_looping_threads.c: example program which cna't be straced
successfully without this fix.
Denys Vlasenko [Tue, 6 Jan 2009 21:45:06 +0000 (21:45 +0000)]
Output format fixes, improving the situation after recent
change which added better handling of processes suddenly
disappearing. Now we often do not finish last line
before exiting in those cases.
The only change affecting something other than output
is change in umovestr where we were calling
abort() on ptrace error.
* strace.c (trace): If trace_syscall() failed with ESRCH,
finish current output line with " <unfinished ...>".
(mp_ioctl): While we are at it, fix gross style mismatch
in this function definition. No code chages.
* syscall.c (trace_syscall): If decode fails on syscall exit,
finish current output line with "= ? <unavailable>".
* util.c (umoven): Do not complain if error is ESRCH.
(umovestr): Do not complain and do not abort() if error is ESRCH.
* defs.h: Remove unused tcp parameter from printtrailer().
* process.c: Adjust printtrailer() calls accordingly.
* strace.c: Adjust printtrailer() calls accordingly.
* syscall.c: Adjust printtrailer() calls accordingly.
Denys Vlasenko [Tue, 6 Jan 2009 15:12:52 +0000 (15:12 +0000)]
* desc.c (printflock): Fix display of fcntl(F_SETLK) on
non-native 32-bit architecture.
Fixes RH#471169 "format fcntl64() system calls for
32 bit application incorrect".
* desc.c: const'ify two static struct xlat vector[]'s,
convert all remaining old style C parameter declarations
in this file.
Denys Vlasenko [Fri, 2 Jan 2009 18:10:08 +0000 (18:10 +0000)]
* syscall.c: more cosmetics. fixed a few localized style discrepancies.
The only actual code change is a trivial one where
a char *array[] made const and static.
Denys Vlasenko [Tue, 30 Dec 2008 20:51:30 +0000 (20:51 +0000)]
Experimental support for -D option.
Unlike normal case, with -D *grandparent* process exec's,
becoming a traced process. Child exits (this prevents traced process
from having children it doesn't expect to have), and grandchild
attaches to grandparent similarly to strace -p PID.
This allows for more transparent interaction in cases
when process and its parent are communicating via signals,
wait() etc. Without -D, strace process gets lodged in between,
disrupting parent<->child link.
* strace.c: Add global flag variable daemonized_tracer for -D option.
(startup_attach): If -D, fork and block parent in pause().
In this case we are already a child, we in fact created a grandchild.
After attaching to grandparent, grandchild SIGKILLs parent.
(startup_child): If -D, parent blocks in wait(), then
execs the program to strace. Normally (w/o -D), it is child
who execs the program.
(main): Detect -D option, call startup_attach() if it is given.
Denys Vlasenko [Tue, 30 Dec 2008 17:50:46 +0000 (17:50 +0000)]
Patch by Kirill A. Shutemov:
Fix some warnings on ARM build.
* defs.h: include <sys/ptrace.h> on arm too.
* syscall.c: EABI arm does not need decode_subcall(), ifdef it out.
Denys Vlasenko [Mon, 29 Dec 2008 19:13:27 +0000 (19:13 +0000)]
* defs.h: Remove sigtrap80 field from struct tcb.
* strace.c: Add ptrace_stop_sig static variable
and use it in place of tcp->sigtrap80.
Add ptrace_opts_set static flag variable.
(trace): Set ptrace options once, not per-process.
If unexpected SIGTRAP is later received,
revert back to using SIGTRAP
(assume old, broken kernel).
Denys Vlasenko [Mon, 22 Dec 2008 19:14:47 +0000 (19:14 +0000)]
Make strace correctly handle SIGTRAP produced by e.g.
kill(2) and by trapping instruction.
* defs.h: Add sigtrap80 field to struct tcb.
* strace.c (alloc_tcb): Initialize it to SIGTRAP.
(detach): Use tcp->sigtrap80 instead of SIGTRAP constant.
(trace): Attempt to set PTRACE_O_TRACESYSGOOD and
PTRACE_O_TRACEEXEC options on each newly attached process,
distinquish between SIGTRAP and (SIGTRAP | 0x80) stops.
Fixes RH#162774 "strace ignores int3 SIGTRAP".
Dmitry V. Levin [Mon, 10 Nov 2008 23:19:13 +0000 (23:19 +0000)]
2008-11-09 Dmitry V. Levin <ldv@altlinux.org>
* util.c (string_quote): Fix support for NUL-terminated string.
Add comments.
(printpathn): Fix the case when "..." was appended to the output
but no truncation was actually made. Add comments.
(printstr): Fix memory allocation. Fix two cases when "..." was
appended to the output but no truncation was actually made.
Add comments.
Dmitry V. Levin [Mon, 10 Nov 2008 17:21:23 +0000 (17:21 +0000)]
2008-10-22 Dmitry V. Levin <ldv@altlinux.org>
Handle socket type flags introduced in linux 2.6.27.
* net.c (socktypes): Add SOCK_DCCP.
(sock_type_flags): New xlat structure.
(tprint_sock_type): New function.
(sys_socket, sys_socketpair): Use it to parse socket type and
socket type flags.
Dmitry V. Levin [Mon, 10 Nov 2008 17:14:58 +0000 (17:14 +0000)]
2008-09-29 Dmitry V. Levin <ldv@altlinux.org>
* strace.c (startup_child): Save child pid for future use.
(main): Exit/kill ourself with straced child's exitcode/signal.
(trace): If signalled process pid matches the saved child pid,
save the signal number. If terminated process pid matches the
saved child pid, save its exit status.
Patch from Denys Vlasenko <dvlasenk@redhat.com>
Roland McGrath [Mon, 25 Aug 2008 03:15:43 +0000 (03:15 +0000)]
2008-08-24 Roland McGrath <roland@redhat.com>
* linux/syscall.h (SYS_socket_subcall et al, SYS_ipc_subcall et al):
Don't define these if [__ARM_EABI__].
Reported by Johannes Stezenbach <js@sig21.net>.
Roland McGrath [Mon, 25 Aug 2008 02:59:36 +0000 (02:59 +0000)]
2008-08-24 Roland McGrath <roland@redhat.com>
* mem.c (madvise_flags): Typo fixes. Rename to madvise_cmds.
(sys_madvise): Use printxval, not printflags.
Reported by Rajeev V. Pillai <rajeevvp@gmail.com>.
Roland McGrath [Wed, 20 Aug 2008 01:59:40 +0000 (01:59 +0000)]
2008-08-19 Roland McGrath <roland@redhat.com>
* signal.c (sys_sigaction, sys_rt_sigaction): Don't omit the rest of
the struct after sa_handler is a known constant. Some sa_flags bits
have meaning even for SIG_IGN/SIG_DFL.
Jan Kratochvil [Wed, 6 Aug 2008 21:43:35 +0000 (21:43 +0000)]
2008-08-06 Jan Kratochvil <jan.kratochvil@redhat.com>
* util.c (CLONE_VM): Define if not defined already.
(setbpt): Clear CLONE_VM in the case we already clear CLONE_VFORK for
SYS_clone and SYS_clone2.
Reported by Michal Nowak.
Fixes RH#455078.
Jan Kratochvil [Wed, 6 Aug 2008 21:38:52 +0000 (21:38 +0000)]
2008-08-06 Jan Kratochvil <jan.kratochvil@redhat.com>
Fix compiler warnings.
* signal.c (sys_signal): Cast to SIG_* to the matching type LONG.
* strace.c (trace): Variables PSR and PC are now signed.
* syscall.c (syscall_enter): Variable RBS_END is now signed long.
Remove/add the RBS_END casts appropriately.
* util.c [IA64] (arg_setup): Variable BSP is now signed long.
Remove/add the BSP casts appropriately.
<ia32>: Initialize *STATE.