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Author SHA1 Message Date
Dmitry V. Levin
f91c9fe814 tests: robustify attach-p-cmd.test against race conditions 
Introduce a synchronization mechanism between attach-p-cmd-p
and attach-p-cmd-cmd processes.

* tests/attach-p-cmd-cmd.c: Include <errno.h> and <sys/stat.h>.
(main): Wait for the lock directory creation by attach-p-cmd-p.
* tests/attach-p-cmd-p.c: Include <errno.h> and <sys/stat.h>.
(main): Create a lock directory and wait for its removal
by attach-p-cmd-cmd.
* tests/attach-p-cmd.test: Assume that test programs work.
 2016-12-06 09:08:36 +00:00
Dmitry V. Levin
09fc30c4c7 tests: cleanup attach-p-cmd.test 
* tests/attach-p-cmd-cmd.c (main): Cleanup expected output.
* tests/attach-p-cmd-p.c (main): Print expected output.
* tests/attach-p-cmd.test: Do not print expected output.
 2016-08-02 16:43:37 +00:00
Dmitry V. Levin
87baaec12e tests/attach-p-cmd-p.c: cleanup 
* attach-p-cmd-p.c (handler): Move code ...
(main): ... here.  Unblock SIGALRM only.
Use alarm() instead of setitimer().
Replace endless loop with a pause() call.
Check that chdir() returns ENOENT.
 2016-06-10 14:34:32 +00:00
Dmitry V. Levin
fa8c286d50 Implement simultaneous use of -p option and tracing of a command 
* strace.c (init): Allow -p option along with a command.
(startup_child): In -D mode, record the parent of the tracer process
as strace_child.
(startup_attach): Save trace_tracer_pid before -D mode fork.
When tracing a command in -f mode, do not check for the command's
threads as it has no threads at this moment.
Never attach to the tracer process.
In -D mode, never attach to the parent of the tracer process,
terminate that process only once at the end of startup_attach,
and reset strace_child.
* strace.1: Document that -p option can be used along with tracing
of a command.
* NEWS: Mention it.
* tests/attach-p-cmd-cmd.c: New file.
* tests/attach-p-cmd-p.c: Likewise.
* tests/attach-p-cmd.test: New test.
* tests/.gitignore: Add attach-p-cmd-cmd and attach-p-cmd-p.
* tests/Makefile.am (check_PROGRAMS): Likewise.
(TESTS): Add attach-p-cmd.test.

This fixes Debian bug #549942.
 2016-01-22 19:37:11 +00:00