| | From | Srikar Dronamraju <> | | Date | Thu, 16 Dec 2010 15:30:49 +0530 | | Subject | [RFC] [PATCH 2.6.37-rc5-tip 18/20] 18: uprobes: commonly used filters. |
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Provides most commonly used filters. Prevents users from having to define their own filters. However this would be useful once we can dynamically associate a filter with a uprobe-event tracer.
Signed-off-by: Srikar Dronamraju <srikar@linux.vnet.ibm.com> --- kernel/uprobes.c | 41 +++++++++++++++++++++++++++++++++++++++++ 1 files changed, 41 insertions(+), 0 deletions(-) diff --git a/kernel/uprobes.c b/kernel/uprobes.c index b0d323c..44a7ff6 100644 --- a/kernel/uprobes.c +++ b/kernel/uprobes.c @@ -1190,6 +1190,46 @@ int uprobe_post_notifier(struct pt_regs *regs) return 0; } +bool uprobes_pid_filter(struct uprobe_consumer *self, struct task_struct *t) +{ + if (t->tgid == (long)self->fvalue) + return true; + return false; +} + +bool uprobes_tid_filter(struct uprobe_consumer *self, struct task_struct *t) +{ + if (t->pid == (long)self->fvalue) + return true; + return false; +} + +bool uprobes_ppid_filter(struct uprobe_consumer *self, struct task_struct *t) +{ + pid_t pid; + + rcu_read_lock(); + pid = task_tgid_vnr(t->real_parent); + rcu_read_unlock(); + + if (pid == (long)self->fvalue) + return true; + return false; +} + +bool uprobes_sid_filter(struct uprobe_consumer *self, struct task_struct *t) +{ + pid_t pid; + + rcu_read_lock(); + pid = pid_vnr(task_session(t)); + rcu_read_unlock(); + + if (pid == (long)self->fvalue) + return true; + return false; +} + struct notifier_block uprobes_exception_nb = { .notifier_call = uprobes_exception_notify, .priority = 0x7ffffff0, @@ -1207,3 +1247,4 @@ static void __exit exit_uprobes(void) module_init(init_uprobes); module_exit(exit_uprobes); +
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