[PATCH v2] Implement output staging for failed/successful syscalls

[Dmitry V. Levin]

Hi,

On Wed, Jan 18, 2017 at 06:12:52PM +0100, Burkhard Kohl wrote:
>   With not_failing_only/failing_only flags, syscall output
>   is written to tcp->memf and either dropped or published
>   at strace_syscall_exiting
> 
> * stage_out.c strace_openmemstream(), drop_staged_out(),
>               publish_staged_out().
> * defs.h      added flags stage_out, failing only
>               struct tcb: new members memf, memfptr, memfloc.
> * syscall.c   print output depending on flags and outcome.
> * strace.c    add option -Z +help
>               modified tprintf, tprints
>               set stage_output in main().
> * Makefile.am new: stage_out.c
> * configure.ac (AC_CHECK_FUNCS): open_memstream
> * strace.1    -z/-Z: description added
> ---
>  Makefile.am  |   1 +
>  configure.ac |   1 +
>  defs.h       |  18 +++++++++
>  stage_out.c  | 120 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
>  strace.1     |   6 +++
>  strace.c     | 107 +++++++++++++++++++++++++++++++++++++++++++++++++---
>  syscall.c    |  18 +++++++++
>  7 files changed, 266 insertions(+), 5 deletions(-)
>  create mode 100644 stage_out.c

I've tried to apply this, but git-am(1) failed with the following
diagnostics:

Applying: Implement output staging for failed/successful syscalls
.git/rebase-apply/patch:55: trailing whitespace.
	size_t memfloc; 
.git/rebase-apply/patch:125: trailing whitespace.
 *  open_memstream returns a FILE stream that allows writing to a 
.git/rebase-apply/patch:126: trailing whitespace.
 *  dynamically growing buffer, that can be either copied to 
.git/rebase-apply/patch:136: trailing whitespace.
	FILE *fp	= NULL;  // to be returned 
.git/rebase-apply/patch:171: trailing whitespace.
			    error_msg("syscall output dropped: %s ...", tcp->memfptr); 
.git/rebase-apply/patch:195: space before tab in indent.
    		if (0 > fprintf(tcp->outf, "%s", tcp->memfptr)) {
.git/rebase-apply/patch:275: trailing whitespace.
#if HAVE_OPEN_MEMSTREAM == 0 
.git/rebase-apply/patch:436: trailing whitespace.
	stage_output = false; 
.git/rebase-apply/patch:444: trailing whitespace.
	stage_output = not_failing_only || failing_only; 
fatal: 9 lines add whitespace errors.


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