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
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