linux/kernel/trace/trace_kprobe.c, branch v3.14-rc5

tracing: Consolidate event trigger code

2014-01-10T02:20:07Z

The event trigger code that checks for callback triggers before and after recording of an event has lots of flags checks. This code is duplicated throughout the ftrace events, kprobes and system calls. They all do the exact same checks against the event flags. Added helper functions ftrace_trigger_soft_disabled(), event_trigger_unlock_commit() and event_trigger_unlock_commit_regs() that consolidated the code and these are used instead. Link: http://lkml.kernel.org/r/20140106222703.5e7dbba2@gandalf.local.home Acked-by: Tom Zanussi Tested-by: Tom Zanussi Signed-off-by: Steven Rostedt

tracing/kprobes: Add trace event trigger invocations

2014-01-06T20:21:43Z

Add code to the kprobe/kretprobe event functions that will invoke any event triggers associated with a probe's ftrace_event_file. The code to do this is very similar to the invocation code already used to invoke the triggers associated with static events and essentially replaces the existing soft-disable checks with a superset that preserves the original behavior but adds the bits needed to support event triggers. Link: http://lkml.kernel.org/r/f2d49f157b608070045fdb26c9564d5a05a5a7d0.1389036657.git.tom.zanussi@linux.intel.com Acked-by: Masami Hiramatsu Signed-off-by: Tom Zanussi Signed-off-by: Steven Rostedt

tracing/uprobes: Add @+file_offset fetch method

2014-01-03T01:57:05Z

Enable to fetch data from a file offset. Currently it only supports fetching from same binary uprobe set. It'll translate the file offset to a proper virtual address in the process. The syntax is "@+OFFSET" as it does similar to normal memory fetching (@ADDR) which does no address translation. Suggested-by: Oleg Nesterov Acked-by: Masami Hiramatsu Acked-by: Oleg Nesterov Cc: Srikar Dronamraju Cc: zhangwei(Jovi) Cc: Arnaldo Carvalho de Melo Signed-off-by: Namhyung Kim

tracing/probes: Implement 'memory' fetch method for uprobes

2014-01-02T21:17:43Z

Use separate method to fetch from memory. Move existing functions to trace_kprobe.c and make them static. Also add new memory fetch implementation for uprobes. Acked-by: Masami Hiramatsu Acked-by: Oleg Nesterov Cc: Srikar Dronamraju Cc: zhangwei(Jovi) Cc: Arnaldo Carvalho de Melo Signed-off-by: Namhyung Kim

tracing/probes: Move 'symbol' fetch method to kprobes

2014-01-02T21:17:41Z

Move existing functions to trace_kprobe.c and add NULL entries to the uprobes fetch type table. I don't make them static since some generic routines like update/free_XXX_fetch_param() require pointers to the functions. Acked-by: Oleg Nesterov Cc: Masami Hiramatsu Cc: Srikar Dronamraju Cc: zhangwei(Jovi) Cc: Arnaldo Carvalho de Melo Signed-off-by: Namhyung Kim

tracing/probes: Implement 'stack' fetch method for uprobes

2014-01-02T21:17:40Z

Use separate method to fetch from stack. Move existing functions to trace_kprobe.c and make them static. Also add new stack fetch implementation for uprobes. Acked-by: Oleg Nesterov Cc: Masami Hiramatsu Cc: Srikar Dronamraju Cc: zhangwei(Jovi) Cc: Arnaldo Carvalho de Melo Signed-off-by: Namhyung Kim

tracing/probes: Split [ku]probes_fetch_type_table

2014-01-02T21:17:39Z

Use separate fetch_type_table for kprobes and uprobes. It currently shares all fetch methods but some of them will be implemented differently later. This is not to break build if [ku]probes is configured alone (like !CONFIG_KPROBE_EVENT and CONFIG_UPROBE_EVENT). So I added '__weak' to the table declaration so that it can be safely omitted when it configured out. Acked-by: Oleg Nesterov Acked-by: Masami Hiramatsu Cc: Srikar Dronamraju Cc: zhangwei(Jovi) Cc: Arnaldo Carvalho de Melo Signed-off-by: Namhyung Kim

tracing/probes: Integrate duplicate set_print_fmt()

2014-01-02T21:17:38Z

The set_print_fmt() functions are implemented almost same for [ku]probes. Move it to a common place and get rid of the duplication. Acked-by: Masami Hiramatsu Acked-by: Oleg Nesterov Cc: Srikar Dronamraju Cc: zhangwei(Jovi) Cc: Arnaldo Carvalho de Melo Signed-off-by: Namhyung Kim

tracing/kprobes: Move common functions to trace_probe.h

2014-01-02T21:17:37Z

The __get_data_size() and store_trace_args() will be used by uprobes too. Move them to a common location. Acked-by: Masami Hiramatsu Acked-by: Oleg Nesterov Cc: Srikar Dronamraju Cc: zhangwei(Jovi) Cc: Arnaldo Carvalho de Melo Signed-off-by: Namhyung Kim

tracing/kprobes: Factor out struct trace_probe

2014-01-02T21:17:29Z

There are functions that can be shared to both of kprobes and uprobes. Separate common data structure to struct trace_probe and use it from the shared functions. Acked-by: Masami Hiramatsu Acked-by: Oleg Nesterov Cc: Srikar Dronamraju Cc: zhangwei(Jovi) Cc: Arnaldo Carvalho de Melo Signed-off-by: Namhyung Kim