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From: "Tzvetomir Stoyanov (VMware)" <tz.stoyanov@gmail.com>
To: rostedt@goodmis.org
Cc: linux-trace-devel@vger.kernel.org
Subject: [PATCH v5 0/3] Add new trace-cmd record options: "--proc-map"
Date: Wed, 14 Aug 2019 11:47:09 +0300
Message-ID: <20190814084712.28188-10-tz.stoyanov@gmail.com> (raw)
In-Reply-To: <20190814084712.28188-1-tz.stoyanov@gmail.com>

New options to trace-cmd record are added:
  - "--proc-map" - Saves traced process(es) address map in trace.dat
    file.
  - "--user" - Executes the traced process as given user.

As "--proc-map" option uses trace-cmd ptrace logic, part of this code is
rewritten. There were some leftovers related to this logic, the code is
upadted.

[
   v5 changes:
        - Added new patch: 
            "Extend ptrace logic to work with multiple filtered pids"
          It resolves "filter_pid" leftover in ptrace related logic.
        - "--proc-map" does not depend on option -F, it works with any command,
          specified as trace-cmd argument or option -P.
        - Renamed "mmap" to "proc-map" - the option name and the names of
          the functions, variables and defines related to this feature.
   v4 changes:
	- Added check for strdup() failure.
	- Made input user string argument of change_user() and run_cmd()
	 constant.
        - Added description of the new "--mmap" trace-cmd option in the 
          program's help and the man page. (Suggested by Slavomir Kaslev)

      Problems, reported by Yordan Karadzhov:
        - Improved the parsing of /proc/<pid>/maps. Made it not so strict, as it
          failed on some machines due to different size of fields. 
        - Implemented trace_pid_mmap_free() cleanup function to free mmap
          related resources at trace-cmd exit.
        - Fixed potential problem with non-terminated string, returned by
          readlink().
        - Coding style fixes.
   v3 changes:
      - "--user" does not depend on option -F, it works with any command,
        specified as trace-cmd argument.
      - Changed tracecmd_search_task_mmap() API to return not only the library
     name, but also the start and end memory addresses.
      - Renamed *tracee* to *task*
      - Improved resources cleanup, in case of an error.
      - Removed (this) changelog from the commit message.
   v2 changes:
     - Check for errors in change_user(). If an error occurs while
       changing the user, the message is printed and the traced 
       process is not executed.
     - Replaced usage of tracecmd_add_option_v() with tracecmd_add_option() API.
     - Added checks to prevent buffer overflow when sscanf (... "%s", buf) is used.
     - Return error in case memory allocation fails.
     - Return error if option string is not in the expected format.
     - Sort memory maps and use binary search to find matching library in the map.
]

Tzvetomir Stoyanov (VMware) (3):
  trace-cmd: Extend ptrace logic to work with multiple filtered pids
  trace-cmd: Save the tracee address map into the trace.dat file.
  trace-cmd: Add option to execute traced process as given user

 Documentation/trace-cmd-record.1.txt |   6 +
 include/trace-cmd/trace-cmd.h        |  10 +
 lib/trace-cmd/trace-input.c          | 172 +++++++++++++++-
 tracecmd/include/trace-local.h       |  10 +
 tracecmd/trace-record.c              | 282 +++++++++++++++++++++++++--
 tracecmd/trace-usage.c               |   2 +
 6 files changed, 464 insertions(+), 18 deletions(-)

-- 
2.21.0


  parent reply index

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-08-14  8:47 [PATCH v2 0/8] Separate trace-cmd and libtracecmd code Tzvetomir Stoyanov (VMware)
2019-08-14  8:47 ` [PATCH v2 1/8] trace-cmd: Move trace-cmd-local.h from the application to the library Tzvetomir Stoyanov (VMware)
2019-08-14  8:47 ` [PATCH v2 2/8] trace-cmd: Move trace-output.c into the library code Tzvetomir Stoyanov (VMware)
2019-08-14  8:47 ` [PATCH v2 3/8] trace-cmd: Move trace-msg.c into the library Tzvetomir Stoyanov (VMware)
2019-08-14  8:47 ` [PATCH v2 4/8] trace-cmd: Move trace-cmd global variable "quiet" to libtracecmd Tzvetomir Stoyanov (VMware)
2019-08-14  8:47 ` [PATCH v2 5/8] trace-cmd: Move trace-cmd global variable "debug" " Tzvetomir Stoyanov (VMware)
2019-08-14  8:47 ` [PATCH v2 6/8] trace-cmd: Move plog() function " Tzvetomir Stoyanov (VMware)
2019-08-14  8:47 ` [PATCH v2 7/8] trace-cmd: Move trace-cmd APIs from trace-cmd.h to trace-local.h Tzvetomir Stoyanov (VMware)
2019-08-14  8:47 ` [PATCH v2 8/8] trace-cmd: Move tracecmd_stack_tracer_status() function to libtracecmd Tzvetomir Stoyanov (VMware)
2019-08-14  8:47 ` Tzvetomir Stoyanov (VMware) [this message]
2019-08-14  8:47 ` [PATCH v5 1/3] trace-cmd: Extend ptrace logic to work with multiple filtered pids Tzvetomir Stoyanov (VMware)
2019-08-14  8:47 ` [PATCH v5 2/3] trace-cmd: Save the tracee address map into the trace.dat file Tzvetomir Stoyanov (VMware)
2019-08-14  8:47 ` [PATCH v5 3/3] trace-cmd: Add option to execute traced process as given user Tzvetomir Stoyanov (VMware)

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