| From | Srikar Dronamraju <> | Date | Mon, 14 Mar 2011 19:07:22 +0530 | Subject | [PATCH v2 2.6.38-rc8-tip 17/20] 17: uprobes: filter chain |
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Loops through the filters callbacks of currently registered consumers to see if any consumer is interested in tracing this task.
Signed-off-by: Srikar Dronamraju <srikar@linux.vnet.ibm.com> --- kernel/uprobes.c | 18 ++++++++++++++++++ 1 files changed, 18 insertions(+), 0 deletions(-)
diff --git a/kernel/uprobes.c b/kernel/uprobes.c index bbedcef..e3a3051 100644 --- a/kernel/uprobes.c +++ b/kernel/uprobes.c @@ -428,6 +428,24 @@ static void handler_chain(struct uprobe *uprobe, struct pt_regs *regs) } /* Acquires uprobe->consumer_rwsem */ +static bool filter_chain(struct uprobe *uprobe, struct task_struct *t) +{ + struct uprobe_consumer *consumer; + bool ret = false; + + down_read(&uprobe->consumer_rwsem); + for (consumer = uprobe->consumers; consumer; + consumer = consumer->next) { + if (!consumer->filter || consumer->filter(consumer, t)) { + ret = true; + break; + } + } + up_read(&uprobe->consumer_rwsem); + return ret; +} + +/* Acquires uprobe->consumer_rwsem */ static void add_consumer(struct uprobe *uprobe, struct uprobe_consumer *consumer) {
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