5 Commits

Author	SHA1	Message	Date
Dmitry V. Levin	a33747a902	tests: robustify attach-p-cmd.test against buggy kernels ... From time to time various kernels, old and new, just go nuts and fail attach-p-cmd.test with the following diagnostics: 12345 --- SIGALRM {si_signo=SIGALRM, si_code=SI_KERNEL} --- -12345 chdir("attach-p-cmd.test -p") = -1 ENOENT (No such file or directory) +12345 syscall_4294967295(0xffe60934, 0x1c0, 0xffe60934, 0x1, 0xffe609b4, 0xffe60a58) = -1 (errno 38) +12345 chdir("attach-p-cmd.test -p") = -1 ENOSYS (Function not implemented) Let's workaround this kernel madness by rewriting the test without use of SIGALRM. * tests/attach-p-cmd.h: New file. * tests/Makefile.am (EXTRA_DIST): Add attach-p-cmd.h. * tests/attach-p-cmd-cmd.c: Include "attach-p-cmd.h". (write_pidfile, wait_for_peer_invocation): New functions. (main): Use them. * tests/attach-p-cmd-p.c: Include <time.h> and "attach-p-cmd.h". (wait_for_peer_invocation, wait_for_peer_termination): New functions. (main): Use them. Do not raise SIGALRM, use nanosleep after peer termination.	2017-12-03 00:25:43 +00:00
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	475d2b5da6	tests/attach-p-cmd-cmd.c: fix potential errno clobbering ... * tests/attach-p-cmd-cmd.c (main): Call getpid before chdir.	2016-05-23 16:39:23 +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