)]}'
{
  "log": [
    {
      "commit": "9b1bf12d5d51bca178dea21b04a0805e29d60cf1",
      "tree": "902a2c0e5882a2152da59a589958d6426dc84643",
      "parents": [
        "b84011508360d6885a9d95a235ec77d56f133377"
      ],
      "author": {
        "name": "KOSAKI Motohiro",
        "email": "kosaki.motohiro@jp.fujitsu.com",
        "time": "Wed Oct 27 15:34:08 2010 -0700"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Wed Oct 27 18:03:12 2010 -0700"
      },
      "message": "signals: move cred_guard_mutex from task_struct to signal_struct\n\nOleg Nesterov pointed out we have to prevent multiple-threads-inside-exec\nitself and we can reuse -\u003ecred_guard_mutex for it.  Yes, concurrent\nexecve() has no worth.\n\nLet\u0027s move -\u003ecred_guard_mutex from task_struct to signal_struct.  It\nnaturally prevent multiple-threads-inside-exec.\n\nSigned-off-by: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nReviewed-by: Oleg Nesterov \u003coleg@redhat.com\u003e\nAcked-by: Roland McGrath \u003croland@redhat.com\u003e\nAcked-by: David Howells \u003cdhowells@redhat.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n"
    },
    {
      "commit": "2f0edac5555983dc28033acce8a355f588fd01b2",
      "tree": "a17d83571df83ca0a09bd048f01e8d9d2e9bbff7",
      "parents": [
        "25baa35befeebe6a4a8d8d12a4fc5b95918bda54"
      ],
      "author": {
        "name": "Oleg Nesterov",
        "email": "oleg@redhat.com",
        "time": "Tue Dec 15 16:47:19 2009 -0800"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Wed Dec 16 07:20:08 2009 -0800"
      },
      "message": "ptrace: change tracehook_report_syscall_exit() to handle stepping\n\nSuggested by Roland.\n\nChange tracehook_report_syscall_exit() to look at step flag and send the\ntrap signal if needed.\n\nThis change affects ia64, microblaze, parisc, powerpc, sh.  They pass\nnonzero \"step\" argument to tracehook but since it was ignored the tracee\nreports via ptrace_notify(), this is not right and not consistent.\n\n\t- PTRACE_SETSIGINFO doesn\u0027t work\n\n\t- if the tracer resumes the tracee with signr !\u003d 0 the new signal\n\t  is generated rather than delivering it\n\n\t- If PT_TRACESYSGOOD is set the tracee reports the wrong exit_code\n\nI don\u0027t have a powerpc machine, but I think this test-case should see the\ndifference:\n\n\t#include \u003cunistd.h\u003e\n\t#include \u003csys/ptrace.h\u003e\n\t#include \u003csys/wait.h\u003e\n\t#include \u003cassert.h\u003e\n\t#include \u003cstdio.h\u003e\n\n\tint main(void)\n\t{\n\t\tint pid, status;\n\n\t\tif (!(pid \u003d fork())) {\n\t\t\tassert(ptrace(PTRACE_TRACEME) \u003d\u003d 0);\n\t\t\tkill(getpid(), SIGSTOP);\n\n\t\t\tgetppid();\n\n\t\t\treturn 0;\n\t\t}\n\n\t\tassert(pid \u003d\u003d wait(\u0026status));\n\t\tassert(ptrace(PTRACE_SETOPTIONS, pid, 0, PTRACE_O_TRACESYSGOOD) \u003d\u003d 0);\n\n\t\tassert(ptrace(PTRACE_SYSCALL, pid, 0,0) \u003d\u003d 0);\n\t\tassert(pid \u003d\u003d wait(\u0026status));\n\n\t\tassert(ptrace(PTRACE_SINGLESTEP, pid, 0,0) \u003d\u003d 0);\n\t\tassert(pid \u003d\u003d wait(\u0026status));\n\n\t\tif (status \u003d\u003d 0x57F)\n\t\t\treturn 0;\n\n\t\tprintf(\"kernel bug: status\u003d%X shouldn\u0027t have 0x80\\n\", status);\n\t\treturn 1;\n\t}\n\nSigned-off-by: Oleg Nesterov \u003coleg@redhat.com\u003e\nAcked-by: Roland McGrath \u003croland@redhat.com\u003e\nCc: \u003clinux-arch@vger.kernel.org\u003e\nCc: Ingo Molnar \u003cmingo@elte.hu\u003e\nCc: Thomas Gleixner \u003ctglx@linutronix.de\u003e\nCc: \"H. Peter Anvin\" \u003chpa@zytor.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n"
    },
    {
      "commit": "ae6d2ed7bb3877ff35b9569402025f40ea2e1803",
      "tree": "80527061ab7615cd890236b777b2be6e909a1573",
      "parents": [
        "b6fe2d117e98805ee76352e6468f87d494a97292"
      ],
      "author": {
        "name": "Roland McGrath",
        "email": "roland@redhat.com",
        "time": "Wed Sep 23 15:56:53 2009 -0700"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Thu Sep 24 07:21:00 2009 -0700"
      },
      "message": "signals: tracehook_notify_jctl change\n\nThis changes tracehook_notify_jctl() so it\u0027s called with the siglock held,\nand changes its argument and return value definition.  These clean-ups\nmake it a better fit for what new tracing hooks need to check.\n\nTracing needs the siglock here, held from the time TASK_STOPPED was set,\nto avoid potential SIGCONT races if it wants to allow any blocking in its\ntracing hooks.\n\nThis also folds the finish_stop() function into its caller\ndo_signal_stop().  The function is short, called only once and only\nunconditionally.  It aids readability to fold it in.\n\n[oleg@redhat.com: do not call tracehook_notify_jctl() in TASK_STOPPED state]\n[oleg@redhat.com: introduce tracehook_finish_jctl() helper]\nSigned-off-by: Roland McGrath \u003croland@redhat.com\u003e\nSigned-off-by: Oleg Nesterov \u003coleg@redhat.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n"
    },
    {
      "commit": "1c216279539bd65c5a3d497e25d441dbddbcf1ec",
      "tree": "38e401a7ebd185fd819aa490c474b220bc388d4f",
      "parents": [
        "dea33cfd99022d82d923a0c6a3bd895fb6683fb2"
      ],
      "author": {
        "name": "Oleg Nesterov",
        "email": "oleg@redhat.com",
        "time": "Wed Jun 17 16:27:29 2009 -0700"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Thu Jun 18 13:03:49 2009 -0700"
      },
      "message": "ptrace: tracehook_unsafe_exec(): remove the stale comment\n\ntracehook_unsafe_exec() doesn\u0027t need task_lock(), remove the old comment.\n\nSigned-off-by: Oleg Nesterov \u003coleg@redhat.com\u003e\nAcked-by: Roland McGrath \u003croland@redhat.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n"
    },
    {
      "commit": "087eb437051b3de817720f9c80c440fc9e7dcce8",
      "tree": "25a72acabe05c3e72dddd942855d4245dfae4b82",
      "parents": [
        "b87297fb405ef13cac375f202d114323b076a56d"
      ],
      "author": {
        "name": "Oleg Nesterov",
        "email": "oleg@redhat.com",
        "time": "Thu Jun 04 16:29:07 2009 -0700"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Thu Jun 04 18:07:40 2009 -0700"
      },
      "message": "ptrace: tracehook_report_clone: fix false positives\n\nThe \"trace || CLONE_PTRACE\" check in tracehook_report_clone() is not right,\n\n- If the untraced task does clone(CLONE_PTRACE) the new child is not traced,\n  we must not queue SIGSTOP.\n\n- If we forked the traced task, but the tracer exits and untraces both the\n  forking task and the new child (after copy_process() drops tasklist_lock),\n  we should not queue SIGSTOP too.\n\nChange the code to check task_ptrace() !\u003d 0 instead. This is still racy, but\nthe race is harmless.\n\nWe can race with another tracer attaching to this child, or the tracer can\nexit and detach in parallel. But giwen that we didn\u0027t do wake_up_new_task()\nyet, the child must have the pending SIGSTOP anyway.\n\nSigned-off-by: Oleg Nesterov \u003coleg@redhat.com\u003e\nAcked-by: Roland McGrath \u003croland@redhat.com\u003e\nCc: Christoph Hellwig \u003chch@infradead.org\u003e\nCc: Ingo Molnar \u003cmingo@elte.hu\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n"
    },
    {
      "commit": "bb24c679a51b1a9b726b901330649e3861814ac0",
      "tree": "0acb31023b4b6ff49e173005fb9baaa3f3b74b2f",
      "parents": [
        "5dfc80be73dd0c212d2e6dd8dbf5afa07e680bbe"
      ],
      "author": {
        "name": "Oleg Nesterov",
        "email": "oleg@redhat.com",
        "time": "Thu Apr 02 16:58:20 2009 -0700"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Thu Apr 02 19:05:00 2009 -0700"
      },
      "message": "tracehook_notify_death: use task_detached() helper\n\nNow that task_detached() is exported, change tracehook_notify_death() to\nuse this helper, nobody else checks -\u003eexit_signal \u003d\u003d -1 by hand.\n\nSigned-off-by: Oleg Nesterov \u003coleg@redhat.com\u003e\nCc: \"Eric W. Biederman\" \u003cebiederm@xmission.com\u003e\nCc: \"Metzger, Markus T\" \u003cmarkus.t.metzger@intel.com\u003e\nAcked-by: Roland McGrath \u003croland@redhat.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n"
    },
    {
      "commit": "43918f2bf4806675943416d539d9d5e4d585ebff",
      "tree": "1de2ea08eed647b181b7f008f95e4bc4ec34c343",
      "parents": [
        "90bc8d8b1a38f1ab131a2399a202e1889db95de8"
      ],
      "author": {
        "name": "Oleg Nesterov",
        "email": "oleg@redhat.com",
        "time": "Thu Apr 02 16:58:00 2009 -0700"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Thu Apr 02 19:04:58 2009 -0700"
      },
      "message": "signals: remove \u0027handler\u0027 parameter to tracehook functions\n\nContainer-init must behave like global-init to processes within the\ncontainer and hence it must be immune to unhandled fatal signals from\nwithin the container (i.e SIG_DFL signals that terminate the process).\n\nBut the same container-init must behave like a normal process to processes\nin ancestor namespaces and so if it receives the same fatal signal from a\nprocess in ancestor namespace, the signal must be processed.\n\nImplementing these semantics requires that send_signal() determine pid\nnamespace of the sender but since signals can originate from workqueues/\ninterrupt-handlers, determining pid namespace of sender may not always be\npossible or safe.\n\nThis patchset implements the design/simplified semantics suggested by\nOleg Nesterov.  The simplified semantics for container-init are:\n\n\t- container-init must never be terminated by a signal from a\n\t  descendant process.\n\n\t- container-init must never be immune to SIGKILL from an ancestor\n\t  namespace (so a process in parent namespace must always be able\n\t  to terminate a descendant container).\n\n\t- container-init may be immune to unhandled fatal signals (like\n\t  SIGUSR1) even if they are from ancestor namespace. SIGKILL/SIGSTOP\n\t  are the only reliable signals to a container-init from ancestor\n\t  namespace.\n\nThis patch:\n\nBased on an earlier patch submitted by Oleg Nesterov and comments from\nRoland McGrath (http://lkml.org/lkml/2008/11/19/258).\n\nThe handler parameter is currently unused in the tracehook functions.\nBesides, the tracehook functions are called with siglock held, so the\nfunctions can check the handler if they later need to.\n\nRemoving the parameter simiplifies changes to sig_ignored() in a follow-on\npatch.\n\nSigned-off-by: Sukadev Bhattiprolu \u003csukadev@linux.vnet.ibm.com\u003e\nAcked-by: Roland McGrath \u003croland@redhat.com\u003e\nSigned-off-by: Oleg Nesterov \u003coleg@tv-sign.ru\u003e\nCc: \"Eric W. Biederman\" \u003cebiederm@xmission.com\u003e\nCc: Daniel Lezcano \u003cdaniel.lezcano@free.fr\u003e\nCc: Ingo Molnar \u003cmingo@elte.hu\u003e\nCc: Thomas Gleixner \u003ctglx@linutronix.de\u003e\nCc: \"H. Peter Anvin\" \u003chpa@zytor.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n"
    },
    {
      "commit": "22f30168d296dbb54a21ebad44c9d735bca6f67b",
      "tree": "6006e18acb6b1157d9b1b0cf9790f4369d84bc4c",
      "parents": [
        "34a35bddb9382fc2663e3137875ee58928f7d704"
      ],
      "author": {
        "name": "Roland McGrath",
        "email": "roland@redhat.com",
        "time": "Fri Sep 05 14:00:23 2008 -0700"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Fri Sep 05 14:39:38 2008 -0700"
      },
      "message": "tracehook: comment pasto fixes\n\nFix some pasto\u0027s in comments in the new linux/tracehook.h and\nasm-generic/syscall.h files.\n\nReported-by: Wenji Huang \u003cwenji.huang@oracle.com\u003e\nSigned-off-by: Roland McGrath \u003croland@redhat.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n"
    },
    {
      "commit": "5861bbfcc10fc0358abf52c7d22850c8d180f0b0",
      "tree": "066a66bd465741973879675b150f517032adcbfa",
      "parents": [
        "685d87f7ccc649ab92b55e18e507a65d0e694eb9"
      ],
      "author": {
        "name": "Roland McGrath",
        "email": "roland@redhat.com",
        "time": "Thu Aug 07 16:55:03 2008 -0700"
      },
      "committer": {
        "name": "Roland McGrath",
        "email": "roland@redhat.com",
        "time": "Thu Aug 07 17:18:47 2008 -0700"
      },
      "message": "tracehook: fix CLONE_PTRACE\n\nIn the change in commit 09a05394fe2448a4139b014936330af23fa7ec83, I\noverlooked two nits in the logic and this broke using CLONE_PTRACE\nwhen PTRACE_O_TRACE* are not being used.\n\nA parent that is itself traced at all but not using PTRACE_O_TRACE*,\nusing CLONE_PTRACE would have its new child fail to be traced.\n\nA parent that is not itself traced at all that uses CLONE_PTRACE\n(which should be a no-op in this case) would confuse the bookkeeping\nand lead to a crash at exit time.\n\nThis restores the missing checks and fixes both failure modes.\n\nReported-by: Eduardo Habkost \u003cehabkost@redhat.com\u003e\nSigned-off-by: Roland McGrath \u003croland@redhat.com\u003e\n"
    },
    {
      "commit": "115a326c1e5cab457924356123bbfd7d783ecf9d",
      "tree": "378baee7316461465ce08cf5c997e7426c2d93e6",
      "parents": [
        "18f6db95dcfa68e93bafe435381299abbffb5c7e"
      ],
      "author": {
        "name": "Roland McGrath",
        "email": "roland@redhat.com",
        "time": "Mon Aug 04 13:56:01 2008 -0700"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Mon Aug 04 17:23:43 2008 -0700"
      },
      "message": "tracehook: kerneldoc fix\n\nMy last change to tracehook.h made it confuse the kerneldoc parser.\nMove the #define\u0027s before the comment so it\u0027s happy again.\n\nSigned-off-by: Roland McGrath \u003croland@redhat.com\u003e\nAcked-by: Randy Dunlap \u003crandy.dunlap@oracle.com\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n"
    },
    {
      "commit": "5c7edcd7ee6b77b88252fe4096dce1a46a60c829",
      "tree": "4936df589df33c671e2e98ea45b89e7f45278f61",
      "parents": [
        "1e24b15b267293567a8d752721c7ae63f281325a"
      ],
      "author": {
        "name": "Roland McGrath",
        "email": "roland@redhat.com",
        "time": "Thu Jul 31 02:04:09 2008 -0700"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Fri Aug 01 12:01:11 2008 -0700"
      },
      "message": "tracehook: fix exit_signal\u003d0 case\n\nMy commit 2b2a1ff64afbadac842bbc58c5166962cf4f7664 introduced a regression\n(sorry about that) for the odd case of exit_signal\u003d0 (e.g. clone_flags\u003d0).\nThis is not a normal use, but it\u0027s used by a case in the glibc test suite.\n\nDying with exit_signal\u003d0 sends no signal, but it\u0027s supposed to wake up a\nparent\u0027s blocked wait*() calls (unlike the delayed_group_leader case).\nThis fixes tracehook_notify_death() and its caller to distinguish a\n\"signal 0\" wakeup from the delayed_group_leader case (with no wakeup).\n\nSigned-off-by: Roland McGrath \u003croland@redhat.com\u003e\nTested-by: Serge Hallyn \u003cserue@us.ibm.com\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n"
    },
    {
      "commit": "a9906a19193db69ad0158f289f839edf8aaf103f",
      "tree": "6168b333784d733213e4978b8f35cdde7ae66e02",
      "parents": [
        "a048d3aff8b828b6c0fa7ddd90a531248ab4e0f9"
      ],
      "author": {
        "name": "Roland McGrath",
        "email": "roland@redhat.com",
        "time": "Sat Jul 26 14:41:26 2008 -0700"
      },
      "committer": {
        "name": "Roland McGrath",
        "email": "roland@redhat.com",
        "time": "Sat Jul 26 14:41:26 2008 -0700"
      },
      "message": "tracehook: comment fixes\n\nThis fixes some typos and errors in \u003clinux/tracehook.h\u003e comments.\nNo code changes.\n\nSigned-off-by: Roland McGrath \u003croland@redhat.com\u003e\n"
    },
    {
      "commit": "828c365cc8b8d38c346fccb19fa80d28f2240831",
      "tree": "cedb0f1ce389f4b12d7b0975ce52c8af7939cfcd",
      "parents": [
        "64b1208d5b0ef8859fd52ea7ae286a3eb994669b"
      ],
      "author": {
        "name": "Roland McGrath",
        "email": "roland@redhat.com",
        "time": "Fri Jul 25 19:45:57 2008 -0700"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Sat Jul 26 12:00:09 2008 -0700"
      },
      "message": "tracehook: asm/syscall.h\n\nThis adds asm-generic/syscall.h, which documents what a real\nasm-ARCH/syscall.h file should define.  This is not used yet, but will\nprovide all the machine-dependent details of examining a user system call\nabout to begin, in progress, or just ended.\n\nEach arch should add an asm-ARCH/syscall.h that defines all the entry\npoints documented in asm-generic/syscall.h, as short inlines if possible.\nThis lets us write new tracing code that understands user system call\nregisters, without any new arch-specific work.\n\nSigned-off-by: Roland McGrath \u003croland@redhat.com\u003e\nCc: Oleg Nesterov \u003coleg@tv-sign.ru\u003e\nReviewed-by: Ingo Molnar \u003cmingo@elte.hu\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n"
    },
    {
      "commit": "64b1208d5b0ef8859fd52ea7ae286a3eb994669b",
      "tree": "ebb92b717406dc104924c4ccdedf14357a62b84f",
      "parents": [
        "b787f7ba677840da16a2228c16571ce8a1fcb799"
      ],
      "author": {
        "name": "Roland McGrath",
        "email": "roland@redhat.com",
        "time": "Fri Jul 25 19:45:56 2008 -0700"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Sat Jul 26 12:00:09 2008 -0700"
      },
      "message": "tracehook: TIF_NOTIFY_RESUME\n\nThis adds tracehook.h inlines to enable a new arch feature in support of\nuser debugging/tracing.  This is not used yet, but it lays the groundwork\nfor a debugger to be able to wrangle a task that\u0027s possibly running,\nwithout interrupting its syscalls in progress.\n\nEach arch should define TIF_NOTIFY_RESUME, and in their entry.S code treat\nit much like TIF_SIGPENDING.  That is, it causes you to take the slow path\nwhen returning to user mode, where you get the full user-mode state\naccessible as for signal handling or ptrace.  The arch code should check\nTIF_NOTIFY_RESUME after handling TIF_SIGPENDING.  When it\u0027s set, clear it\nand then call tracehook_notify_resume().\n\nIn future, tracing code will call set_notify_resume() when it wants to get\na callback in tracehook_notify_resume().\n\nSigned-off-by: Roland McGrath \u003croland@redhat.com\u003e\nCc: Oleg Nesterov \u003coleg@tv-sign.ru\u003e\nReviewed-by: Ingo Molnar \u003cmingo@elte.hu\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n"
    },
    {
      "commit": "b787f7ba677840da16a2228c16571ce8a1fcb799",
      "tree": "b1838c4ae7f38c00efc2375871a255275500f245",
      "parents": [
        "2b2a1ff64afbadac842bbc58c5166962cf4f7664"
      ],
      "author": {
        "name": "Roland McGrath",
        "email": "roland@redhat.com",
        "time": "Fri Jul 25 19:45:55 2008 -0700"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Sat Jul 26 12:00:09 2008 -0700"
      },
      "message": "tracehook: force signal_pending()\n\nThis defines a new hook tracehook_force_sigpending() that lets tracing\ncode decide to force TIF_SIGPENDING on in recalc_sigpending().\n\nThis is not used yet, so it compiles away to nothing for now.  It lays the\ngroundwork for new tracing code that can interrupt a task synthetically\nwithout actually sending a signal.\n\nSigned-off-by: Roland McGrath \u003croland@redhat.com\u003e\nCc: Oleg Nesterov \u003coleg@tv-sign.ru\u003e\nReviewed-by: Ingo Molnar \u003cmingo@elte.hu\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n"
    },
    {
      "commit": "2b2a1ff64afbadac842bbc58c5166962cf4f7664",
      "tree": "660640eb95117ce6f7436331f23f73805abced10",
      "parents": [
        "fa00b80b3c41a845b3d56f866fb40a2e98754c51"
      ],
      "author": {
        "name": "Roland McGrath",
        "email": "roland@redhat.com",
        "time": "Fri Jul 25 19:45:54 2008 -0700"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Sat Jul 26 12:00:09 2008 -0700"
      },
      "message": "tracehook: death\n\nThis moves the ptrace logic in task death (exit_notify) into tracehook.h\ninlines.  Some code is rearranged slightly to make things nicer.  There is\nno change, only cleanup.\n\nThere is one hook called with the tasklist_lock write-locked, as ptrace\nneeds.  There is also a new hook called after exit_state changes and\nwithout locks.  This is a better place for tracing work to be in the\nfuture, since it doesn\u0027t delay the whole system with locking.\n\nSigned-off-by: Roland McGrath \u003croland@redhat.com\u003e\nCc: Oleg Nesterov \u003coleg@tv-sign.ru\u003e\nReviewed-by: Ingo Molnar \u003cmingo@elte.hu\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n"
    },
    {
      "commit": "fa00b80b3c41a845b3d56f866fb40a2e98754c51",
      "tree": "819d6966cad1fdeef3f32497c696afb203e3720b",
      "parents": [
        "7bcf6a2ca5f639b038c48711ebe6c4eca2036641"
      ],
      "author": {
        "name": "Roland McGrath",
        "email": "roland@redhat.com",
        "time": "Fri Jul 25 19:45:54 2008 -0700"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Sat Jul 26 12:00:09 2008 -0700"
      },
      "message": "tracehook: job control\n\nThis defines the tracehook_notify_jctl() hook to formalize the ptrace\neffects on the job control notifications.  There is no change, only\ncleanup.\n\nSigned-off-by: Roland McGrath \u003croland@redhat.com\u003e\nCc: Oleg Nesterov \u003coleg@tv-sign.ru\u003e\nReviewed-by: Ingo Molnar \u003cmingo@elte.hu\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n"
    },
    {
      "commit": "7bcf6a2ca5f639b038c48711ebe6c4eca2036641",
      "tree": "4219a0725d581310f729d4616361febd700f0574",
      "parents": [
        "283d7559e7712f95a05331eb0a85394c6368101b"
      ],
      "author": {
        "name": "Roland McGrath",
        "email": "roland@redhat.com",
        "time": "Fri Jul 25 19:45:53 2008 -0700"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Sat Jul 26 12:00:09 2008 -0700"
      },
      "message": "tracehook: get_signal_to_deliver\n\nThis defines the tracehook_get_signal() hook to allow tracing code to slip\nin before normal signal dequeuing.  This lays the groundwork for new\ntracing features that can inject synthetic signals outside the normal\nqueue or control the disposition of delivered signals.  The calling\nconvention lets tracehook_get_signal() decide both exactly what will\nhappen and what signal number to report in the handler/exit.\n\nSigned-off-by: Roland McGrath \u003croland@redhat.com\u003e\nCc: Oleg Nesterov \u003coleg@tv-sign.ru\u003e\nReviewed-by: Ingo Molnar \u003cmingo@elte.hu\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n"
    },
    {
      "commit": "283d7559e7712f95a05331eb0a85394c6368101b",
      "tree": "9d8249b44cfe9a3216320940ec5754ecfd220bcd",
      "parents": [
        "445a91d2fe3667fb8fc251433645f686933cf56a"
      ],
      "author": {
        "name": "Roland McGrath",
        "email": "roland@redhat.com",
        "time": "Fri Jul 25 19:45:52 2008 -0700"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Sat Jul 26 12:00:09 2008 -0700"
      },
      "message": "tracehook: syscall\n\nThis adds standard tracehook.h inlines for arch code to call when\nTIF_SYSCALL_TRACE has been set.  This replaces having each arch implement\nthe ptrace guts for its syscall tracing support.\n\nSigned-off-by: Roland McGrath \u003croland@redhat.com\u003e\nCc: Oleg Nesterov \u003coleg@tv-sign.ru\u003e\nReviewed-by: Ingo Molnar \u003cmingo@elte.hu\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n"
    },
    {
      "commit": "445a91d2fe3667fb8fc251433645f686933cf56a",
      "tree": "496f0715ba3079f3bf98e9808480fe7f25872b16",
      "parents": [
        "35de254dc60f91004b3b5ebb1fc7b2c3093d6032"
      ],
      "author": {
        "name": "Roland McGrath",
        "email": "roland@redhat.com",
        "time": "Fri Jul 25 19:45:52 2008 -0700"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Sat Jul 26 12:00:09 2008 -0700"
      },
      "message": "tracehook: tracehook_consider_fatal_signal\n\nThis defines tracehook_consider_fatal_signal() has a fine-grained hook for\ndeciding to skip the special cases for a fatal signal, as ptrace does.\nThere is no change, only cleanup.\n\nSigned-off-by: Roland McGrath \u003croland@redhat.com\u003e\nCc: Oleg Nesterov \u003coleg@tv-sign.ru\u003e\nReviewed-by: Ingo Molnar \u003cmingo@elte.hu\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n"
    },
    {
      "commit": "35de254dc60f91004b3b5ebb1fc7b2c3093d6032",
      "tree": "101e174247bb3174c8abe0fb8d1405ed6a4db6d1",
      "parents": [
        "c45aea27617d6a1e0aacddc3b0233f704222fcbd"
      ],
      "author": {
        "name": "Roland McGrath",
        "email": "roland@redhat.com",
        "time": "Fri Jul 25 19:45:51 2008 -0700"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Sat Jul 26 12:00:09 2008 -0700"
      },
      "message": "tracehook: tracehook_consider_ignored_signal\n\nThis defines tracehook_consider_ignored_signal() has a fine-grained hook\nfor deciding to prevent the normal short-circuit of sending an ignored\nsignal, as ptrace does.  There is no change, only cleanup.\n\nSigned-off-by: Roland McGrath \u003croland@redhat.com\u003e\nCc: Oleg Nesterov \u003coleg@tv-sign.ru\u003e\nReviewed-by: Ingo Molnar \u003cmingo@elte.hu\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n"
    },
    {
      "commit": "c45aea27617d6a1e0aacddc3b0233f704222fcbd",
      "tree": "9406cbb5f3ca0029b2f6ef44a951fb7d21fe93f9",
      "parents": [
        "fa8e26ccd485216fc45c8c2dd1ec3b7ef1a0a2f8"
      ],
      "author": {
        "name": "Roland McGrath",
        "email": "roland@redhat.com",
        "time": "Fri Jul 25 19:45:50 2008 -0700"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Sat Jul 26 12:00:09 2008 -0700"
      },
      "message": "tracehook: tracehook_signal_handler\n\nThis defines tracehook_signal_handler() as a hook for the arch signal\nhandling code to call.  It gives ptrace the opportunity to stop for a\npseudo-single-step trap immediately after signal handler setup is done.\n\nSigned-off-by: Roland McGrath \u003croland@redhat.com\u003e\nCc: Oleg Nesterov \u003coleg@tv-sign.ru\u003e\nReviewed-by: Ingo Molnar \u003cmingo@elte.hu\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n"
    },
    {
      "commit": "fa8e26ccd485216fc45c8c2dd1ec3b7ef1a0a2f8",
      "tree": "b6c3059593d7d185aaf7f5b69c363a48b18c5bb1",
      "parents": [
        "0d094efeb1e98010c6b99923f1eb7e17bf1e3a74"
      ],
      "author": {
        "name": "Roland McGrath",
        "email": "roland@redhat.com",
        "time": "Fri Jul 25 19:45:50 2008 -0700"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Sat Jul 26 12:00:09 2008 -0700"
      },
      "message": "tracehook: tracehook_expect_breakpoints\n\nThis adds tracehook_expect_breakpoints() as a formal hook for the nommu\ncode to use for its, \"Is text-poking likely?\" check at mmap time.  This\nnames the actual semantics the code means to test, and documents it.\n\nSigned-off-by: Roland McGrath \u003croland@redhat.com\u003e\nCc: Oleg Nesterov \u003coleg@tv-sign.ru\u003e\nReviewed-by: Ingo Molnar \u003cmingo@elte.hu\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n"
    },
    {
      "commit": "0d094efeb1e98010c6b99923f1eb7e17bf1e3a74",
      "tree": "6ee271b6da5796e5321d2ab6f9d7d9ba03c300a2",
      "parents": [
        "dae33574dcf5211e1f43c7e45fa29f73ba3e00cb"
      ],
      "author": {
        "name": "Roland McGrath",
        "email": "roland@redhat.com",
        "time": "Fri Jul 25 19:45:49 2008 -0700"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Sat Jul 26 12:00:08 2008 -0700"
      },
      "message": "tracehook: tracehook_tracer_task\n\nThis adds the tracehook_tracer_task() hook to consolidate all forms of\n\"Who is using ptrace on me?\" logic.  This is used for \"TracerPid:\" in\n/proc and for permission checks.  We also clean up the selinux code the\ncalled an identical accessor.\n\nSigned-off-by: Roland McGrath \u003croland@redhat.com\u003e\nCc: Oleg Nesterov \u003coleg@tv-sign.ru\u003e\nReviewed-by: Ingo Molnar \u003cmingo@elte.hu\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n"
    },
    {
      "commit": "dae33574dcf5211e1f43c7e45fa29f73ba3e00cb",
      "tree": "090eb4af17451836fb39cebf57fbee64a6bd23b5",
      "parents": [
        "daded34be96b1975ff8539ff62ad8b158ce7d842"
      ],
      "author": {
        "name": "Roland McGrath",
        "email": "roland@redhat.com",
        "time": "Fri Jul 25 19:45:48 2008 -0700"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Sat Jul 26 12:00:08 2008 -0700"
      },
      "message": "tracehook: release_task\n\nThis moves the ptrace-related logic from release_task into tracehook.h and\nptrace.h inlines.  It provides clean hooks both before and after locking\ntasklist_lock, for future tracing logic to do more cleanup without the\nlock.\n\nThis also changes release_task() itself in the rare \"zap_leader\" case to\nset the leader to EXIT_DEAD before iterating.  This maintains the\ninvariant that release_task() only ever handles a task in EXIT_DEAD.  This\nis a common-sense invariant that is already always true except in this one\narcane case of zombie leader whose parent ignores SIGCHLD.\n\nThis change is harmless and only costs one store in this one rare case.\nIt keeps the expected state more consisently sane, which is nicer when\ndebugging weirdness in release_task().  It also lets some future code in\nthe tracehook entry points rely on this invariant for bookkeeping.\n\nSigned-off-by: Roland McGrath \u003croland@redhat.com\u003e\nCc: Oleg Nesterov \u003coleg@tv-sign.ru\u003e\nReviewed-by: Ingo Molnar \u003cmingo@elte.hu\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n"
    },
    {
      "commit": "daded34be96b1975ff8539ff62ad8b158ce7d842",
      "tree": "8cab5e809e513efd1a403e587a53a1e75365d1fc",
      "parents": [
        "09a05394fe2448a4139b014936330af23fa7ec83"
      ],
      "author": {
        "name": "Roland McGrath",
        "email": "roland@redhat.com",
        "time": "Fri Jul 25 19:45:47 2008 -0700"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Sat Jul 26 12:00:08 2008 -0700"
      },
      "message": "tracehook: vfork-done\n\nThis moves the PTRACE_EVENT_VFORK_DONE tracing into a tracehook.h inline,\ntracehook_report_vfork_done().  The change has no effect, just clean-up.\n\nSigned-off-by: Roland McGrath \u003croland@redhat.com\u003e\nCc: Oleg Nesterov \u003coleg@tv-sign.ru\u003e\nReviewed-by: Ingo Molnar \u003cmingo@elte.hu\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n"
    },
    {
      "commit": "09a05394fe2448a4139b014936330af23fa7ec83",
      "tree": "a7b3f0ffe271d4d35c3b98a99183d8792ea4db53",
      "parents": [
        "30199f5a46aee204bf437a4f5b0740f3efe448b7"
      ],
      "author": {
        "name": "Roland McGrath",
        "email": "roland@redhat.com",
        "time": "Fri Jul 25 19:45:47 2008 -0700"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Sat Jul 26 12:00:08 2008 -0700"
      },
      "message": "tracehook: clone\n\nThis moves all the ptrace initialization and tracing logic for task\ncreation into tracehook.h and ptrace.h inlines.  It reorganizes the code\nslightly, but should not change any behavior.\n\nThere are four tracehook entry points, at each important stage of task\ncreation.  This keeps the interface from the core fork.c code fairly\nclean, while supporting the complex setup required for ptrace or something\nlike it.\n\nSigned-off-by: Roland McGrath \u003croland@redhat.com\u003e\nCc: Oleg Nesterov \u003coleg@tv-sign.ru\u003e\nReviewed-by: Ingo Molnar \u003cmingo@elte.hu\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n"
    },
    {
      "commit": "30199f5a46aee204bf437a4f5b0740f3efe448b7",
      "tree": "9855ecf45727f6c41e9d75d4a5ac68c35546c14d",
      "parents": [
        "ff1188646c6870f336e910fb894eeed74f50471f"
      ],
      "author": {
        "name": "Roland McGrath",
        "email": "roland@redhat.com",
        "time": "Fri Jul 25 19:45:46 2008 -0700"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Sat Jul 26 12:00:08 2008 -0700"
      },
      "message": "tracehook: exit\n\nThis moves the PTRACE_EVENT_EXIT tracing into a tracehook.h inline,\ntracehook_report_exec().  The change has no effect, just clean-up.\n\nSigned-off-by: Roland McGrath \u003croland@redhat.com\u003e\nCc: Oleg Nesterov \u003coleg@tv-sign.ru\u003e\nReviewed-by: Ingo Molnar \u003cmingo@elte.hu\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n"
    },
    {
      "commit": "6341c393fcc37d58727865f1ee2f65e632e9d4f0",
      "tree": "6e88d928e17f663b225884e81877a7a069d7c514",
      "parents": [
        "88ac2921a71f788ed693bcd44731dd6bc1994640"
      ],
      "author": {
        "name": "Roland McGrath",
        "email": "roland@redhat.com",
        "time": "Fri Jul 25 19:45:44 2008 -0700"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Sat Jul 26 12:00:08 2008 -0700"
      },
      "message": "tracehook: exec\n\nThis moves all the ptrace hooks related to exec into tracehook.h inlines.\n\nThis also lifts the calls for tracing out of the binfmt load_binary hooks\ninto search_binary_handler() after it calls into the binfmt module.  This\nchange has no effect, since all the binfmt modules\u0027 load_binary functions\ndid the call at the end on success, and now search_binary_handler() does\nit immediately after return if successful.  We consolidate the repeated\ncode, and binfmt modules no longer need to import ptrace_notify().\n\nSigned-off-by: Roland McGrath \u003croland@redhat.com\u003e\nCc: Oleg Nesterov \u003coleg@tv-sign.ru\u003e\nReviewed-by: Ingo Molnar \u003cmingo@elte.hu\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n"
    },
    {
      "commit": "88ac2921a71f788ed693bcd44731dd6bc1994640",
      "tree": "db7039299713fec545061f884878563f8ae0caa6",
      "parents": [
        "267e2a9c71b8e088ac307f9549f71468e86e26c1"
      ],
      "author": {
        "name": "Roland McGrath",
        "email": "roland@redhat.com",
        "time": "Fri Jul 25 19:45:43 2008 -0700"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Sat Jul 26 12:00:08 2008 -0700"
      },
      "message": "tracehook: add linux/tracehook.h\n\nThis patch series introduces the \"tracehook\" interface layer of inlines in\n\u003clinux/tracehook.h\u003e.  There are more details in the log entry for patch\n01/23 and in the header file comments inside that patch.  Most of these\nchanges move code around with little or no change, and they should not\nbreak anything or change any behavior.\n\nThis sets a new standard for uniform arch support to enable clean\narch-independent implementations of new debugging and tracing stuff,\ndenoted by CONFIG_HAVE_ARCH_TRACEHOOK.  Patch 20/23 adds that symbol to\narch/Kconfig, with comments listing everything an arch has to do before\nsetting \"select HAVE_ARCH_TRACEHOOK\".  These are elaborted a bit at:\n\n\thttp://sourceware.org/systemtap/wiki/utrace/arch/HowTo\n\nThe new inlines that arch code must define or call have detailed kerneldoc\ncomments in the generic header files that say what is required.\n\nNo arch is obligated to do any work, and no arch\u0027s build should be broken\nby these changes.  There are several steps that each arch should take so\nit can set HAVE_ARCH_TRACEHOOK.  Most of these are simple.  Providing this\nsupport will let new things people add for doing debugging and tracing of\nuser-level threads \"just work\" for your arch in the future.  For an arch\nthat does not provide HAVE_ARCH_TRACEHOOK, some new options for such\nfeatures will not be available for config.\n\nI have done some arch work and will submit this to the arch maintainers\nafter the generic tracehook series settles in.  For now, that work is\navailable in my GIT repositories, and in patch and mbox-of-patches form at\nhttp://people.redhat.com/roland/utrace/2.6-current/\n\nThis paves the way for my \"utrace\" work, to be submitted later.  But it is\nnot innately tied to that.  I hope that the tracehook series can go in\nsoon regardless of what eventually does or doesn\u0027t go on top of it.  For\nanyone implementing any kind of new tracing/debugging plan, or just\nunderstanding all the context of the existing ptrace implementation,\nhaving tracehook.h makes things much easier to find and understand.\n\nThis patch:\n\nThis adds the new kernel-internal header file \u003clinux/tracehook.h\u003e.  This\nis not yet used at all.  The comments in the header introduce what the\nfollowing series of patches is about.\n\nThe aim is to formalize and consolidate all the places that the core\nkernel code and the arch code now ties into the ptrace implementation.\n\nThese patches mostly don\u0027t cause any functional change.  They just move\nthe details of ptrace logic out of core code into tracehook.h inlines,\nwhere they are mostly compiled away to the same as before.  All that\nchanges is that everything is thoroughly documented and any future\nreworking of ptrace, or addition of something new, would not have to touch\ncore code all over, just change the tracehook.h inlines.\n\nThe new linux/ptrace.h inlines are used by the following patches in the\nnew tracehook_*() inlines.  Using these helpers for the ptrace event stops\nmakes it simple to change or disable the old ptrace implementation of\nthese stops conditionally later.\n\nSigned-off-by: Roland McGrath \u003croland@redhat.com\u003e\nCc: Oleg Nesterov \u003coleg@tv-sign.ru\u003e\nReviewed-by: Ingo Molnar \u003cmingo@elte.hu\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n"
    }
  ]
}